Opticron 31050 32mm Rubber Objective Lens Covers OG M Pair fits models with Outer Diameter 42-44mm,Black: Amazon.co.uk: Electronics & Photo
Tethered Objective Lens Covers Set of 2 fits 10x42 and 8x42 binoculars | eBay
Rubber Objective Lens Covers | Opticron
SWAROVSKI Objective Lens Cover Pro (EL 42, EL Range) from Land Sea & Sky
2 Pieces Binoculars Protective Rubber Objective Lens Cap 42mm For Telescope With Outer Diameter 52-54mm Drop Shipping - Microscope Parts & Accessories - AliExpress