!!! IN STOCK NOW !!! This a NEW!!! Main Shaft Gear # 210802 for a MOORE-O-MATIC by LINEAR model XX133 It drives the main sprocket shaft . Recently inspected and is in excellent condition, no problems. This is a New old stock, gear and instructions only, Does not include any other attachments or fasteners. Gear measurements: 2 1/4" across, 1" high, 20 teeth,tooth 5/8"high, hole 1/2" MODEL XX133, X150X-S If you have one of these openers it is a very good idea to keep one of these gears on hand in case yours wears out (about 7 to 10 years usually) It's a good bet the serviceman you call to repair your moore-o-matic Won't have it on his truck or available at all. Be Prepared........ it's a cheap insurance policy against buying a new opener. warranty 1 year replacement only,buyer pays shipping on any warranty (317)A4,b5 ON SALE THIS WEEK only $24.00 This gear is a dual purpose part, 1st it transfers the power from the motor to the door, 2nd. it is made to strip out and fail in the case of a severe malfunction in the door system saving the door operator from further damage. !