Opticron Rubber Objective Lens Covers are designed to protect binocular objective lenses from impact, water, and dirt during transit or storage. Made from durable rubber, they fit securely over objective lens tubes with an outer diameter of 32mm. The friction-fit design ensures they stay in place while allowing for easy removal when needed. These covers remain attached when the binoculars are in use, providing continuous protection from dust and dirt. Lightweight at just 10g, they measure 90x35x8mm and offer a reliable solution for keeping lenses in top condition.