SafeSiders Steri-Tracker. Tracks number of sterilizations / uses with sterilization /use counter (move slider to the next position). Accommodates 16 instruments of all lengths. Millimeter gauge measures SafeSiders and positions rubber stop. Foam insert for holding / cleaning files (12/pk. included). Autoclavable up to 275 degrees F, 136 degrees C (no dry heat). Note: To ensure practical instrument sharpness EDS recommends discarding SafeSiders after 6 uses.