The Butler Creek Multi-Flex Flip-Up lens covers offer the incredible lens protection of Butler Creek's standard flip-up covers, but with additional flex in the collars to fit a wider range of scopes. *Please see application chart below to help determine the correct size. Fitment:30910- 1.450" to 1.500" Objective bell diameter31315- 1.530" to 1.558" Objective bell diameter31719- 1.612" to 1.646" Objective bell diameter32021- 1.700" to 1.735" Objective bell diameter32527- 1.800" to 1.840" Objective bell diameter32829- 1.890" to 1.919" Objective bell diameter33031- 1.960" to 1.998" Objective bell diameter33334- 2.043" to 2.100" Objective bell diameter33940- 2.220" to 2.250" Objective bell diameter34344- 2.310" to 2.360" Objective bell diameter34647- 2.430" to 2.461" Objective bell diameterFeaturesFlexible collar provides tight fit for multiple scope sizesWaterproof and airtight...