The high quality rubber provides gentle contact with the eyes. Eyeguards provide an extra protective layer between the microscope eyepieces and the user. Eye guards provide comfort and eye relief for long viewing sessions. Helps protect your eyes from stray light in the working environment. PLEASE KINDLY NOTE: These eye guards are designed for microscope eyepieces, not binoculars.

Foldable. One pair of eye guards contains 2 pieces. The inner lip (6mm, 0.24 inch) holds the eye guard in place to prevent it from sliding down on the eyepieces. For microscope eyepieces, not binoculars. Will fit microscope eyepieces that have a 30mm (1 3/16 inch) outer diameter. The eye guards stretch slightly by 1 mm. Please measure the outer diameter of your eyepiece to ensure fit. These of rubber microscope eye guards have an inner diameter of 30mm (1 3/16 inch) mounting size.

Brand: BoliOptics. Item Dimensions LxWxH: 1.18 x 1.18 x 0.7 inches. Color: Black. Manufacturer: Boli Optics Inc. Date First Available: February 20, 2018. Is Discontinued By Manufacturer: No. Best Sellers Rank: #83 in Microscope Lenses. Customer Reviews: 4.4 out of 5 stars 27 ratings 4.4 out of 5 stars. Item model number: SZ02013911. : B078164JJ1. Item Weight: 0.8 ounces. Product Dimensions: 1.18 x 1.18 x 0.7 inches.