Upgrade your optics protection with these durable rubber lens caps designed for binoculars and telescopes. Featuring flexible waterproof design, these covers provide scratch-resistant shielding for both objective (42mm/50mm) and eyepiece lenses. Compatible with popular models including 8x42, 10x50, and 20x50 configurations. Constructed from high-grade elastic rubber for secure non-slip fit. Inner diameters precisely sized at 41-43mm (eyepiece) and 52-60mm (objective) to accommodate minor size variations. IPX4 water resistance ensures protection in damp conditions. Easy to install with stretch-fit design simply stretch over lens edges for instant protection. Ideal replacement for worn or lost original equipment. Comes in classic black for discreet functionality.