MULTIPURPOSE - This flat convex lens is great for scientific research laboratories, offices and daily use, suitable for scientific researchers, office staffs, families, etc.

WHAT YOU GET - The package comes with 2pcs flat convex lens that is 50 x 4mm / 1.97 x 0.16 inch(OD*H), 300mm Focal Length.

RELIABLE MATERIAL - This flat convex lens is made of glass, which is safe, scratch-resistant, reusable and provides excellent optical performance.

SPECIAL DESIGNED - This flat convex lens is accurately measured and well polished, and can be used to manufacture telescopes for different circumstances, helping people better focus light to see the image of objects clearly.

KINDLY NOTE - Please read the dimensions clearly before ordering, and please handle the lens carefully after receiving the product.