Specifications:Dioptre: 1.5 - 3 - 8.5 - 10. Multiplying power of lens: 0.375x - 0.75x - 2.125x - 2.5x. Material of lens: acrylic resin (protected by crack-proof rigid coating). Size of lens : 89mm x 29mm (3.5"x 1.14"). Single lens diameter: 29mm (1.14"). Weight: 148g (5.2oz)Packaging: Blister Card