Features:
Inner diameter : about 29-30mm.
Soft rubber, can be folded.
Multiple diameter rubber eye guards eye Shielding.
Produced of rubber for long service.
Eye cups for microscopes telescopes.

Specifications:
Component : rubber
Inner diameter : about 29-30mm
Outer diameter : about 32-33

Note:
Please allow 1 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.

Package includes:
Pair Rubber Eyepiece