This Industrial Strength brand tube plug is made from 316LVM ASTM F-138 implant grade stainless steel. It is hand polished to a mirror finish. Each plug is grooved and comes with two black o-rings. 1-1/8" through 2" tube plugs are not grooved. The wearable area between the o-rings is 3/8" and the overall length is 1/2".
This item will have either clear or black o-rings, depending upon what the manufacturer uses. We have no control over this. If you want a particular color o-rings , be sure to get them separately.