Outside diameter is 3 mm. Inside is 1.5mm. Wire is .036 in. Nickel free. I can hear the counting and packing crew "no - don't make us count these." We get 'em in packs of 500 - we're shipping 'em in packs of 500. You save money, and we don't have some of the staff hunting and killing other staff.
Lead-free. Nickel-free. Bulk Pack. 3mm (500)