Pandahall 1 Box Iron Jump Rings, Close but Unsoldered, Nickel Free, Antique Bronze, 4~10x0.7~1mm; about 59g/box Size: about 4~10mm in diameter, 0.7~1mm thick; about 61g/box. Material: Iron Metal Color: Antique Bronze Finish: Nickel Free Shape: Ring Jump rings, a staple item in any jewelry maker's supply inventory, are helpful and available in jewelry design. Shipped by USPS from China, usually takes 7~15 days to receive it. Expedited shipping service available.