Butler Creek Tactical One-Piece Eyepiece Scope Cover, Size 19-20 (1.730-1.775-Inch, 43.9-45.1mm) Tactical flip up caps Protect your expensive optics from dust Unique one piece design Provide a clear field of view Unique one-piece living hinge design Flexible lid easily folds up for use Keeps dust, dirt and weather off lens surfaces Built for heavy use and reliable in all weather/temperature conditions Tight, flexible collar provides custom fit for multiple scopes