Paracord Planet's O-Rings can be used in luggage, accessories, hardware, backpacks, and much more. Material: Steel Color: Silver Outer Diameter: 1.375 Inches (35mm) Inner Diameter: 1 Inch (25.4mm) Weight: 8.6oz Package Includes: 20 X Silver Metal O Shaped Rings Note: Paracord Planet O-Rings are welded closed and can only be opened using proper cutting tools. Features: A lovely shape that fits ideally in luggage and backpacks. Made of smooth textured and polished steel. Highly durable and difficult to fade or tarnish.