Replacement tinnerman bracket. Fits all ARL and CSL/Classroom series roll laminators except CSL/Classroom Series I and does not fit machines with the following serial number sequences: 0****-****, 1****-****, 4****-****, 5****-****, 9****-****, G****-****, or W****-****. May be listed as part number 609P or A4503 in Owner's Manual.