The Butler Creek 20050 Flip-Open Eyepiece Scope Cover in Size 05, a 1.43" / 36.40mm black polymer option, delivers reliable lens protection with a watertight and airtight seal and a convenient flip-open design that lets you quickly access your eyepiece with a simple thumb flick. Butler Creek offers a wide selection of both objective and optical scope lens covers in more than 30 sizes, and these covers are custom fitted to ensure a snug, protective fit for your scope, guarding against dust, moisture, and debris while preserving optical clarity. This flip-open eyepiece cover combines rugged build with practical usability, making it an ideal accessory for hunters, shooters, and outdoor enthusiasts who demand dependable protection without sacrificing speed or ease of use during field conditions. The Size 05 cover is designed to fit standard eyepiece lenses, providing a secure, airtight shield when your scope is not in use and a seamless opening action when you need to reacquire your target. Built by Butler Creek, this cover stands up to harsh environments and frequent handling, helping you maintain optimum lens performance and extend the life of your optics.