Features: High precision polished for sleek appearance. Marine grade 304 stainless steel - superior strength and rust resistance. Marine grade 304 stainless steel - superior strength and rust resistance. Non-rusting stainless steel ring - versatile strap, binding and rigging hardware. Rings are sized by ring thickness and inside diameter. Specification: Material: 304 Stainless Steel Color: Silver Package Weight: Approx. 23-66g/0.8-2.3oz Application: Yoga rings, pets, diving, rock climbing, mountain climbing, etc. Size Chart: Model Thickness * Inner Diameter 06025 6mm * 25mm 06030 6mm * 30mm 06035 6mm * 35mm 06040 6mm * 40mm 06045 6mm * 45mm 06050 6mm * 50mm 06060 6mm * 60mm 06080 6mm * 80mm Package list: 1 * Welded O Ring Package List 1High precision polished for sleek appearance. 2Marine grade 304 stainless steel - superior strength and rust resistance. 3Marine grade 304 stainless steel - superior strength and rust resistance. 4Non-rusting stainless steel ring - versatile strap, binding and rigging hardware. 5Rings are sized by ring thickness and inside diameter.