Features: Inner diameter : about 29-30mm. Soft rubber, can be folded. Multiple diameter rubber eye guards eye Shielding. Produced of quality rubber for long service. Eye cups for microscopes telescopes. Specifications: Material: rubber Inner diameter : about 29-30mm Outer diameter : about 32-33 Package Includes: Pair Rubber Eyepiece note: Please allow to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.
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