Description: 【Applicability of Scope Lens Extender Cover】Scope lens rubber cover is compatible with riflescopes with an outer diameter of 39-43.5mm. 【Rubber Ocular Cover in high-quality material】Made from Rubber with Multi-Folds and an Ergonomic Eye Cup, Providing Ample durability, flexibility, lighter, and softness. Stretches over the eyepiece to provide a comfortable cushion for the eye and Protection Against Recoil. 【High-Performance Eyeshade Design】Relieve eye strain by blocking glare or enhancing low light, and improve target focus by eliminating distractions from peripheral movement. Eyeshade design enables quick eye positioning for proper eye relief and optic centers alignment to enhance target acquisition and sighting accuracy. 【Quick installation, Flexible for various environments】Works well in both rain and snow. Don't let the rain end your hunting Having scope covers that keep your optics dry, without having to remove anything. 【Buy with Confidence】Package included 1x rubber ocular cover eye protector. NOTE: Please allow 1-2mm differences due to manual measurement. There is a certain error in the applicable size, if there is any mismatch, please contact after-sales customer service in time. Size Chart: Length 12cm/4.72inch Inner dia. 3.9cm/1.54inch Outer dia. 4.3cm/1.69inch Package Includes: 1 ocular cover eye protector Note: Please allow slightly errors due to manual measurement and different monitors.