Material: metal, nickel free
Size and inside diameter: #1 (13.0mm), #3 (13.7mm), #5 (14.4mm), #9 (15.7mm), #11 (16.4mm, #13 (17.0mm), #15 (17.7mm), #17 (18.4mm)
Size and inside diameter: #1 (13.0mm), #3 (13.7mm), #5 (14.4mm), #9 (15.7mm), #11 (16.4mm, #13 (17.0mm), #15 (17.7mm), #17 (18.4mm)
