Material: made of stainless steel, hard, long life, not easy to rust.

Size: 4x20mm inner diameter

Surface flatness: the surface is flat and smooth without burrs, high quality workmanship, sturdy and durable.

Widely used: suitable for tying camping, hunting, fishing and travelling equipment. Rigging kayaks, anchor rides and downriggers on sailboats. Homemade straps, tie down posts and carriers.

Package includes:20pcs smooth welded 304 stainless steel O-rings welded rings