Trimmed to the same size as heaters, these pads provide thermal insulation to minimize heat loss. Insulation pads also are placed between clamping (backing) plates and the heater for uniform pressure during heater installation. This paper does not have a cut out area for the heater lead bulge. If the backing plate does not have a cut out area for the leads attachment you must use two pieces of ceramic paper and make this cut out in each. Features: Insulator pad temperature limits of 1260°C limits assures suitablity for use in all mica heater applications .125" ceramic fiber paper Pre-baked at Minco prior to shipment to minimize smoking and outgassing at initial burn-in RoHS Compliant Ordering Match the 4-digit heater part number with the 4-digit number on these insulation pads to ensure a perfect alignment match for any heater Install per Minco Engineering Instruction #347.