Bulk 150 gram pack of strong base metal jump rings, approx 10.4mm outer diameter (O.D.), approx 7.7mm inner diameter (I.D.) diameter, approx 1.35mm thick. Require two pair of pliers to open, strong enough for the heaviest beads. Note that these rings come "open" - will require pliers to close. Available in dark silver (nickel) colour only. BULK pack contains approximately 450 rings.