This set of 2 Tethered Objective Lens Caps from Vortex is designed for use with 42mm Diamondback binoculars. They are independently tethered to each lens and offer additional protection for your lenses. These are available here as a replacement or spare for the ones originally included with the binoculars.
VORTEX OPTICS VIPER 42MM TETHERED OBJECTIVE CAP SET FEATURES
Vortex Tethered Objective Lens Caps for 42mm Diamondback Binoculars (Set of 2)
VORTEX OPTICS VIPER 42MM TETHERED OBJECTIVE CAP SET SPECIFICATIONS
Package: Type Clam Pack/ Plastic
Brand: Sig Sauer