BButler Creek Multiflex Flip-Open Objective Scope Cover, Size 30-31 ReviewbP PP Butler Creek Multiflex Flip-Open Objective Scope Cover, Size 30-31 PFast, flip-open design; tight, flexible color provides custom fit for multiple scopesPWater-tight, friction mounts anchors them to your scope; air-tight semi-O-ring keeps out dust andPTruly ambidextrous; silent spring hinges won't spook gamePInstant action lids pop open at the touch of a thumbPPerforms from -40 to 120 Degrees F.