Eyepiece Cover Size: Universal scope extender. 36 mm inner diameter eyepiece. Suitable for 36mm-42mm ocular lens scope (Flexible to wear).
Material: Made of pleated rubber, and with Multi-Folds and an Ergonomic Oblique Eye Cup, Providing Ample Flexibility as Comfortable Cushion and Protection. Durable, flexible, pleasant to the touch and easy to install. Rubber eye piece constructed for maximum comfort of your eye.
High Performance: Eyeshade design enables quick eye positioning for proper eye relief and optic center alignment to speed up target acquisition and increase sighting accuracy.