Product Name : Fishing O Ring;Material : Rubber Color : Black;Outside Diameter : 6/0" Inside Diameter : 2/0";Thickness : 2mm/0" Net Weight : 3g Description: Each O ring is 6 outside diameter and 2mm thickness. Great to be used as seals for fittings or as fly fishing tie accessories. Package Content : 30 x Fishing O Rings Note: Light and varied exhibits can cause the colour of the article within the photo a bit of varied from the real thing. The size allowed error is +/- 1-3cm.