Features: Durable, flexible, lightweight and soft rubber material.Made from Rubber with MultiFolds and an Ergonomic Obliques Eye Cup, Providing AmpleFlexibility as Comfortable Cushion and Protections. Extends over the eyeglass to provide a comfortable cushion fortheeye. Preventsglares,helps focusthe mind and protects the eyes from harm. Improves accuracy through quick eye positioning for proper eye relief and optical centrealignments. This rubber eyepiece cover eye protector fitsmost optical instruments with eyepiece sizes from 36mm to 43.5mm Specifications: Suitable for 36mm-43.5mm ocular lens scope (Flexible to wear). Material of Eyepiece hood : Made from Rubber with MultiFolds and an Ergonomic Obliques Eye Cup Color: Black Material: Rubber Internal Eyepiece Cover Size: approx 36mm inner diameter For: 36~43.5mm Eyepiece (flexible fit) Package Dimensions:approx 17x10.5X5cm/6.7x4.14X1.97" Package Includes: 1PC x Obliques Eyepiece Hood note: Due to the problems of lighting effectsand shootingangles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.