The Opticron Rubber Objective Lens Covers are designed to provide reliable protection for binocular objective lenses with an outer diameter of 34mm. Made from durable rubber, these covers safeguard your lenses from damage caused by impact, dirt, and water during transit or while in storage. The friction fit ensures the covers stay securely in place, yet they are easily removable when needed. They offer effective protection against dust and dirt, helping to maintain the clarity and integrity of your lenses. Even when the instrument is in use, the covers remain attached, making them a convenient and practical accessory for any outdoor enthusiast.