Butler Creek Multi-Flex Flip-Open Objective Lens Cap 51.9-53.5mm

Butler Creek Multi-Flex Flip-Open Lens Flip Cap 51.9-53.5mm
The new Multi-Flex lens and eyepiece caps from Butler Creek offer you the same great features as the standard flip-open series, but this model line is equipped with a flexible and waterproof plastic housing that is suitable for multiple scope sizes due to its custom fit.

same basic function and design as the standard flip-open series
close-fitting, flexible housing provides custom fit for multiple scopes
waterproof/airproof lens/eyepiece protection
caps can be opened silently with a thumb click

Here you can find the Butler Creek guide for properly measuring diameters: Butler Creek Scope Cover Guide