Replacement base channel/foot bracket. Fits all ARL classic/squared profile machines except Digital. Fits CSL/Classroom Series II and gray Series III machines. Fits all new/round profile ARL and CSL/Classroom machines except machines with the following serial number sequences: 0****-****, 1****-****, 4****-****, 5****-****, 9****-****, G****-****, W****-****, or machines with with serial numbers beginning with ">H."> May be listed as part number 602B or A9905 in Owner's Manual.