Excellent fit for zeiss classic 10x40b - Vortex 42mm Tethered Objective Lens Covers

I've got the Zeiss Classic 10x40B armored binoculars. Was looking for a tethered cap with a good fit. The SKU number on these is: VX-BA-LNCR42-CAP4254. I've seen these advertised other places as Vortex 42/54. I'm guessing that's the min/max measurement of the objective end they'll go around. Don't confuse that measurement with the advertised size of the objective LENS. What matters is the outside diameter of your binoc housing. Any, for me, these work perfect. They're made of pretty thick rubber-type polymer, not cheap stuff. The tether loop will stretch over the ends and has enough grip to hold onto the tapered sides of my binocs. The objective lens cap itself stretches a bit over the ends just enough to hold securely onto the binocs covering the pricey glass. Caps don't fall off when you move around but are easily pulled off by hand. Very happy with these!