3pcs High Speed 1.6mm Bur Holder Block Autoclavable Case 40 Holes High Speed 1.6mm Bur Holder Block Autoclavable Case 40 Holes Autoclavable under the high temperature of 135 degree and pressure of 0.22Mpa 1 dental bur block covering 40 holes for FG bur, point for High Speed Material: HIGH QUALITY Aluminum 3 blocks (1 golden + 1 silver + 1 red)