15 Bright Colors: package includes 30pcs metal O rings in 15 bright colors--pink, white, green, yellow, black, blue, red, orange, purple, etc; each color 2pcs; a variety of colors and enough quantity to meet your different needs. Sturdy Material: these spring O rings are made of zinc alloy, lightweight but durable, surface coating resistant to corrosion and rust and high strength, popular DIY accessories in daily life. Size Details: each key ring clip is about 0.78 inch(20mm) in diameter, 0.13 inch(3.5mm) thick, 7 Gauge, thick enough for a long time use; usually used for webbing, strapping, handbag, flat cords, lanyards, belting, key ring, etc. Easy to Open and Close: the hook clip designed with built-in spring, open and close smoothly, quick release, return to its original size and shape, making the item very easy to use and convenient to take along. Wide Application: the O rings are suitable for making harnesses, clothes and luggage belts, handbags, belting, lanyards, flat cordskeychains, dog collars, webbing and lanyard, hang cards or other items as you like.