Butler Creek 21314 Multi-Flex Eyepiece Black Polymer Size 13-14 39.90-40.80mm

Eyepiece protection for hunters and shooters Flip-Open scope covers are custom fit to your scope create a watertight airtight seal and open with a touch of your thumb. An ergonomic button with a non-slip surface for one touch action operates the fast flip-open design with a silent hinge to keep your eye on the target and not spook game. It weighs less than an ounce and has been tested to -40 degrees F. The Multi-Flex model features additional flex in the collars to fit a wider range of scopes. The fit range is .01 under and .025 over the listed measurements.