The Opticron Rubber Objective Lens Covers for an outer diameter of 33mm offer reliable protection for binocular objective lenses. Designed to fit securely over the lens tubes, these covers shield your lenses from damage caused by impact, water, and dirt while in transit or storage. The friction fit ensures they stay in place, yet they can be easily removed when needed. Ideal for keeping your lenses free from dust and dirt, these covers remain attached even when the instrument is in use.