Weaver Polar Scope Lens Caps (Size J, 1.612-1.66) protects your lens glass from dirt and dust, cuts glare, and isolates positive light rays for unmatched image transmission in almost any light. These polar lens covers stay put during stalks. With a push of a button they open quietly and quickly from normal shooting positions for easy target acquisition. A soft rubber sleeve provides a snug fit on a variety of scopes, even in the coldest weather. Many sizes are available to fit most makes and models of scopes.