Welded Metal O Ring Stainless Steel Rings Polish Webbing All Sizes NEW. HIGH GRADE STAINLESS STEEL O-Rings. 1,2,4,10,20,50. 3mmX15mm, 3mmx20mm, 4mmx25mm, 4mmx30mm, 5mmX40mm. 15mm, 20mm, 25mm, 30mm, 40mm. High Grade Stainless Steel. Ideal for Dog Leashes, DIY, Webbing, Leather Crafts or other Crafts and a variety of jobs all around. Widely used in industry and furniture decoration industry. 1,2,4,10,20,50X HIGH GRADE STAINLESS STEEL O-Rings.