Butler Creek 25-26-27 Objective Multiflex Flip-Open Scope Cover

Basic objective end, flip open scope cover, works well at keeping gunk off of your lens. Makes no noise when you open it, opens easily and works quite nicely. When you close it, it snaps solidy shut, and stays shut. They don't offer any info on which parts number relates to your scope diameter, so I have listed all obj. end cover numbers with their sizes. Other than that, the product is quite nice, thick plastic yet stretchable enough to slide on and stay on. Hinge is also quite durable with a metal spring. Hope this helps...
01-25.4mm~~~26-46.2mm
04-27.8mm~~~27-46.7mm
02A-30.0mm~~~28-48.0mm
02-31.0mm~~~29-48.7mm
03A-33.0mm~~~30-49.8mm
03-34.0mm~~~31-50.7mm
05-35.2mm~~~33-51.9mm
07-36.3mm~~~34-53.3mm
09-37.7mm~~~39-56.4mm
10-38.1mm~~~40-57.2mm
11-39.1mm x 34.0mm~~~43-58.7mm
12-44.7mm x 38.9mm~~~44-59.9mm
13-38.9mm~~~45-61.2mm
15-39.6mm~~~46-61.7mm
17-40.9mm~~~47-62.5mm...Read more

Well, I am sure it is a fine product, but I have yet to receive it. I received it's counterpart and am extremely pleased. The vendor I used failed to send me the product, failed to notify me and only after I contacted them did I find out the product was not in stock. Started my quest for this item 2.5 weeks before Christmas and yet to get it.

I bought this scope cover for my Nikon Buckmaster 6-18x40 Riflescope (SF Matte, BDC) - more specifically for the Nikon 8053 Matte Sunshade for 40mm Scope. I bought the version of the scope cover that was a tad larger in size and just put a strip of black electrical tape around the sunshade to get the scope cover to fit snuggly. I put this on my .308 with no isses (no loosening or turning of the scope cover).