Air Filter, For Use With Grainger Item Number 31XC42, 31XC50, 31XC54, 31XC62, 31XC66, 31XC67, 31XC70, 31XC71, 31XC77, 31XC83, 31XC87, For Use With Mfr. Model Number KM-1300SAH, KM-1300SAH3, KM-1800SAH, KM-1800SAH3, KMD-900MAH, KML-250MAH, KML-450MAF, KML-450MAH, KML-450MWF, KML-450MWH, KML-451MAH, KML-600MAH