4 gram pack of strong base metal jump rings, 6mm - 6.3mm outer diameter (O.D.), 4.2mm - 4.5mm inner diameter (I.D.) diameter, 0.9mm - 0.95mm thick. Require two pair of pliers to open, strong enough for the heaviest beads. Available in rose gold colour only (also referred to as bright copper). 4 gram pack contains approximately 40 rings.