Made of great and safe material, they're durable and safe for use. They are in , with fine workmanship, you will have the good touch feeling. Let you give full play to your imagination, and develop creativity and hand-on skill. Features - ColorGrey -Material:Alloy - Size: 1.80X1.80X1.00cm/0.71X0.71X0.39in - When used together with some other jewelry, great for making and unique rings. - Enough DIY ring bases, which can meet your various using needs. Smooth surface processing that will not scratch your fingers, great DIY accessories for home jewelry making. - Can be a good gift choice for your friends who like DIY, they will like it very much. These adjustable flat ring is great for making DIY jewelry and crafts - These DIY ring bases are well designed, looking really with excellent workmanship. - Please let your imagination run riot and create something satisfying. Gluing with resins, beads or other decoration to create unique rings. Package list: 400 blank