Material: titanium alloy/stainless steel Diameter:HB3.5 length:12-44 (a group of 2mm) Diameter:HB4.0 length:14-50 (a group of 2mm) Diameter:HB4.5 length:20-60 (a group of 2mm) Diameter:HB6.5 length:30-120 (a group of 5mm). Pe film + dailynizing paper