Material: stainless steel Packing&Model:  0.10-0.50mm,7 Pcs/set,1Set includes following sizes: 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, 0.40 mm, 0.50 mm                                      0.10-0.60mm,9 Pcs/set,1Set includes following sizes: 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm,0.35mm, 0.40 mm, 0.50 mm,0.60mm Color: sliver     High strength and hardness.     Can be sterilized in a steam autoclave, dry heat autoclave, or in chemical cold sterile.     For orthodontic Interproximal enamel reducted treatment.