Product Name: O Ring; Material: RubberOuter diameter: 36mm; Inner diameter: 30mmThickness: 3,1mm, color: black100% brand new and high quality.Package Contents: 20 x O RingOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
