Best Six Seasons in 2026

2-Pack Fresnel Lens Diameter 300mm(11.81")

Thickness: 2mm, Material: PMMA(acrylic)

Great for Visual Aid education, Solar heating experiment, Solar Cooking outside, DIY Solar concentrator, Scientific Research, Magnifying.

1-Pack Round Fresnel Lens Magnifier

Size:Φ200mm, Thickness:2mm, Material: PMMA (Acrylic)

High Light Transmittance, High Efficiency in Focusing, High Precision.

2PCS-Pack big fresnel lenses

Size:Φ400mm, Focal length:240mm, Thickness:3mm, Material:PMMA(acrylic)

Visual Aid for education - Great for reading small text, DIY Solar Cooking, DIY Solar Heater, and DIY PROJECTION TV, For Scientific Research

2PCS/Unit large fresnel lenses

Size:Φ120mm, Focal length:220mm, Thickness:2mm, Material: PMMA (Acrylic)

Visual Aid for education - Great for solar heating experiment, DIY Solar Cooking, DIY Solar Heater, For Scientific Research

Diameter 80mm(3.15") with different focal length

Thickness: 2mm, Material: PMMA(acrylic)

Great for Visual Aid education, Solar heating experiment, DIY Solar concentrator, Scientific Research, Magnifying.

1PCS/Pack acrylic large fresnel lens, linear focal

Size:300*300mm, Focal length:300mm, Thickness:2mm, Material:PMMA(acrylic)

Visual Aid for education - Great for DIY Projects and Scientific Research

2pcs fresnel lenses Φ250mm with focal length 1000mm

Thickness:2mm, Material: PMMA (Acrylic)

Visual Aid for education - Great for solar heating experiment, DIY Solar Cooking, DIY Solar Heater, For Scientific Research

2pcs fresnel lenses Φ150mm with focal length 100mm

Thickness:2mm, Material: PMMA (Acrylic)

Visual Aid for education - Great for solar heating experiment, DIY Solar Cooking, DIY Solar Heater, For Scientific Research

2PCS/Pack square acrylic fresnel lenses

Size:150*150mm, Focal length:160mm, Thickness:2mm, Material:PMMA(acrylic)

Visual Aid for education - Great for reading small text, DIY Solar Cooking, DIY Solar Heater, and DIY PROJECTION TV, For Scientific Research

2PCS-PACK fresnel lenses, Acrylic ultrathin=

Size:Φ360mm, Focal length:680mm, Thickness:3mm, Material:PMMA(acrylic)

Visual Aid for education - Great for solar heating, DIY Solar projectors, DIY Solar Heater, and DIY PROJECTION TV, For Scientific Research

Utilizes Standard A2 Front Sight Post

Precision Machined from Matte Black Anodized Aircraft Aluminum

Posi-lock Retention Design Prevents Sight Tower From Collapsing when in Use

SKILL DEVELOPMENT: Problem Solving, Critical Thinking, Analytical Thinking, Sequential Thought Process, Directional Concepts, Visual Tracking and 2-D to 3-D Correspondence

INTRODUCE children to coding with this easy programmable Mouse; Mouse lights up and sounds and also features two speeds are perfect for tabletop or floor play

EASY PUSH-BUTTON: Use the pictorial direction coding cards to plan a path; then, program the mouse with easy push-button controls and send him on his way to follow your commands. Requires 3 AAA batteries, not included.

Fiber-optics for the BRIGHTEST AIMING POINTS even in low-light conditions

TRI-DOT AIMING SYSTEM of contrasting front and rear colors

CONCEALED FIBER cannot be seen by target; SNAG RESISTANT DESIGN fits standard holsters

Fits Ruger Gunsite Scout Rifle in .308, .450 Bushmaster, .350 Legend, & 5.56 x 45 in both RH & LH configurations

XS Sights Rail And Ghost Ring Rear Sight Aperture Upgrades Push Your Rifle To Greater Distances With Increased Accuracy.

Light Weight, Versatile Optic Mount Accepts Scout Scopes, Traditional Scopes, And Red Dot Optics.

Flat black rear

140" Wide Front, 150" Notch

White outline

Use this equilateral prism to split a beam of light into its spectral components (the colors of the rainbow).

Side Length: 1.38 inch / 35mm, Wider than most other prisms on the market. Makes them easier to hold and use.

Show your kids a rainbow, or use our prism for photography to create unique pictures.

All steel construction

Includes six LitePipes, in various colors

Fits all Ruger MK I, II, III and MK IV heavy barrel guns

PERFECT FOR MARINE - Marine binoculars with 7x magnification and 50mm objective lens;22 mm eye relief,6.8mm exit pupil,and field of view is 396 feet at 1000 yards / 132 meters at 1000 meters.

ADAPT TO EXTREME ENVIRONMENT - Completly waterproof and float in water.Nitrogen-purged fog proofed Stable,comfortable to hold and highly durable.

BRIGHT AND CLEAR - Porro prism system for a wide field of view.Premium BAK4 prism and Fully multi-coated optics produce bright,crisp images.

PERFECT FOR MARINE - Marine binoculars with 7x magnification and 50mm objective lens;22 mm eye relief,6.8mm exit pupil,and field of view is 396 feet at 1000 yards / 132 meters at 1000 meters.

ADAPT TO EXTREME ENVIRONMENT - Completly waterproof and float in water.Nitrogen-purged fog proofed Stable,comfortable to hold and highly durable.

BRIGHT AND CLEAR - Porro prism system for a wide field of view.Premium BAK4 prism and Fully multi-coated optics produce bright,crisp images.

PERFECT FOR MARINE - Marine binoculars with 7x magnification and 50mm objective lens;22 mm eye relief,6.8mm exit pupil,and field of view is 396 feet at 1000 yards / 132 meters at 1000 meters.

ADAPT TO EXTREME ENVIRONMENT - Completly waterproof and float in water.Nitrogen-purged fog proofed Stable,comfortable to hold and highly durable.

BRIGHT AND CLEAR - Porro prism system for a wide field of view.Premium BAK4 prism and Fully multi-coated optics produce bright,crisp images.

PERFECT FOR MARINE - Marine binoculars with 7x magnification and 50mm objective lens;22 mm eye relief,6.8mm exit pupil,and field of view is 396 feet at 1000 yards / 132 meters at 1000 meters.

ADAPT TO EXTREME ENVIRONMENT - Completly waterproof and float in water.Nitrogen-purged fog proofed Stable,comfortable to hold and highly durable.

BRIGHT AND CLEAR - Porro prism system for a wide field of view.Premium BAK4 prism and Fully multi-coated optics produce bright,crisp images.

CARBON-HYBRID SIGHT - With TRU-FUSION Hybrid Technology, it is the first and only micro-adjustable bow sight constructed with the combination of carbon composites and aluminum, providing excellent strength-to-weight ratio and unparalleled durability.

NEW STANDARD - Featuring PRO-BRITE Pin Technology for increased durability and brightness and extra-long fibers for maximum brightness, Carbon-Hybrid is the new standard for ultra-lightweight, multi-pin, micro-adjustable bow sights.

ADJUSTABLE - The Carbon-Hybrid bow sight features reversible bracket for an increased vertical adjustment range and is adjustable both for left and right-handed shooters.

SPHERICAL || Each lens is spherical in shape and measures 2" (50mm) in diameter

FOCAL LENGTH VARIETY || Converging and diverging focal lengths in 200mm, 300mm and 500mm

OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with ground edges

SPARK MORE CURIOSITY! Encourage your kiddo’s natural curiosity about space, science, and the universe with this fully functional, easy-to-use MoonScope and robust journal packed with engaging, hands-on, astronomy activities

REAL, WORKING TELESCOPE: Explore Saturn, Jupiter, and even the mountain ranges on the moon, magnified 90x larger

22-PAGE ACTIVITY JOURNAL: Eat your way through the lunar phases, write your own moon myth, draw the man in the moon, and so much more – the included journal is packed with inspiring, hands-on activity ideas

High Accuracy and Precision

Made from High Grade Optical Glass

50mm Diameter, 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL)

Fits Walther P99 and PPQ

Brightness and durability of our original Tritium sights, but with added Pro-level features; Tritium night sights transition from standard white dot sights during the daylight, to glowing green dots in the the dark

Utilizes quality Swiss tritium for maximum brightness and unmatched visibility in all shooting conditions 24/7; Glows in the dark with no batteries or light sources needed

Rubber armored exterior for shock resistance and a firm non-slip grip

High-reflectivity silver-alloy mirror coating for a bright and clear view

Waterproof (up to 1m/3.3ft for 10 minutes) and nitrogen-purged for fog-free performance

New

Mint Condition

Dispatch same day for order received before 12 noon