They are made from good quality material for long time and durable use. Premium materialand fine workmanship can ensure its durability and practicability.It is simple in design, but very practical in use, which brings great convenience to you. Features - Material:Stainless steel.- Size: About2.30X2.30X1.00cm/0.90X0.90X0.39inch.-When used together with some jewelry,great for making customized and unique rings.- Enough DIY ring bases, which can meet your various using needs.- Can be a good gift choice for your friends who like DIY, they will like it very much.- These DIY ring bases are well designed, looking really exquisite with excellent workmanship.- Please let your imagination run riot and create something satisfying.Packing list: 10 x Ring Bases