Feature: Flip-open design. Protect your scope lens from scratches or dust. Material: Plastic Color: Black Pay Attention: The caliber size is the internal size of the cover, also is for the external diameter of the scope, before you buy it, you need to measure the diameter of your scope. Choose: #1 Black Flip-open Cover 25.5MM,30MM,33MM,34MM,35MM,37MM,38MM,39MM,39.8MM,41MM,42MM,43MM,44MM,45MM,46MM, 47MM,50MM #2 Clear Flip-open Cover 30mm,39mm,39.8mm, 42mm, 43mm, 44mm, 46mm, 47mm，57mm. Package Include: 2pcs Lens Cover Notice: 1.1cm=10mm=0.39inch. 2.Please allow 1-2mm error due to manual measurement and make sure you do not mind before ordering. 3.Please understand that colors may exist chromatic aberration as the different placement of pictures. On Jun 28, 2024 at 01:52:41 PDT, seller added the following information: