Measure the amount of interproximal reduction Material - Stainless Steel Measurements - 0.1, 0.2, 0.25, 0.3, 0.4, & 0.5mm Autoclavable - Yes Sterilize Before Use - Yes Stainless steel (made in the USA), autoclavable and reusable. During sterilization, care should be taken to keep the Incremental Thickness Gauge and dissimilar metals from coming into contact with each other in order to prevent potential oxidation. Suitable sterilization methods are dry heat, or steam heat autoclave, or chemiclave.