[1 BOX 400PCS JUMP RINGS]: Perfect for handicraft enthusiasts and beginners. There are 400pcs open jump ring inside the packaging, sufficient in quantity to meet your daily manual craftsmanship needs. [COLORFUL OPEN JUMP RINGS]: Jump ring sets are very special and can attract people's attention. If you want to make distinctive accessories to make yourself more personalized, rainbow jump ring is your perfect choice. [SIZE]: Metal connector rings: about 6mm in diameter, 1mm thick, 18 Gauge, inner diamater: 4mm, 10 colors, 40pcs/color, 400pcs. [PREMIUM MATERIAL]: Split rings are made of alloy, not easy to rust and fade, can keep the luster for a long time, more importantly, it is very hard, not easy to deformation. [WIDE APPLICATION]: You can use o rings to make earrings, bracelets, necklaces, key chains, and mobile phone charms. You can also use them to replace damaged or faded jump rings, which are widely used.