925 STERLING SILVER PLATED 304 STAINLESS STEEL: The open jump rings are made of 925 sterling silver plated 304 stainless steel. The material is hard and durable, shiny and not easy to fade, can withstand friction. Also, can come into contact with water without being corroded 600PCS 4 SIZES: There are 600pcs silver jump rings in 4 sizes, 150pcs each size. Come with a plastic box which can be use to storage and avoid being lose SIZE: All jump rings are 20 gauge or 0.8mm/0.03in. 4 diameter sizes, 4mm/0.16in, 5mm/0.2in, 6mm/0.24in, 8mm/0.31in. The corresponding inner diameters are 2.4mm/0.09in, 3.4mm/0.13in, 4.4mm/0.17in, 6.4mm/0.25in DIY CRAFTS: You can use jump rings to make many crafts, jewelries. To attach charms on earrings, necklaces, bracelet, keychain. Simply use the tool to open the jump ring and it will be tight enough to close without worrying about it falling off CONNECTION CLASP: Any item with a hole that needs to be attached can use a jump ring. Multiple ones can be connected together for extra length, and used with a clasp can be opened and closed at any time Beebeecraft Crafted Only For You Beebeecraft 600Pcs 4 Sizes Jump Rings 925 Sterling Silver Plated 304 Stainless Steel Open Connector Ring Silver Bulk 20 Gauge for Jewelry Making DIY 4mm/5mm/6mm/8mm Material: 304 Stainless Steel Feature: 304 STAINLESS STEEL: The open jump rings are made of 304 stainless steel. The material is hard and durable , will not fade, can withstand friction and not prone to scratching. Also, can come into contact with water without being corroded 600PCS 4 SIZES: There are 600pcs silver jump rings in 4 sizes, 150pcs each size. Come with a plastic box which can be use to storage and avoid being lose SIZE: All jump rings are 20 gauge or 0.8mm/0.03in. 4 diameter sizes, 4mm/0.16in, 5mm/0.2in, 6mm/0.24in, 8mm/0.31in. The corresponding inner diameters are 2.4mm/0.09in, 3.4mm/0.13in, 4.4mm/0.17in, 6.4mm/0.25in DIY CRAFTS: You can use jump rings to make many crafts, jewelries. To attach charms on earrings, necklaces, bracelet, keychain. Simply use the tool to open the jump ring and it will be tight enough to close without worrying about it falling off CONNECTION CLASP: Any item with a hole that needs to be attached can use a jump ring. Multiple ones can be connected together for extra length, and used with a clasp can be opened and closed at any time Package list: 600*Jump Rings: 4mm/5mm/6mm/8mm