1.75 Inch ID x 192

Quick ship, good value, part matched the description and worked perfectly.

Knew from garage door opener install man that I would need this device to interface with the Homelinks system. Was cheaper to buy online and intall myself. It did take clearing the old Homelinks codes in my vehicle before it worked, but now works very well. A little bummed that they dropped the price $5 after I had already bought it.

I highly recommend Preferred Doors. I recently purchased a gear and pulley replacement set for my 20 year old Craftsman belt drive 1/2 HP opener. The parts were very reasonably priced and of excellent quality. What set this purchase apart from others was that it included everything needed to do the job, gears, clips, bushings, spacers, grease... They also included very thorough details on how to replace the parts, reset the limit switches test the opener and reset the wireless openers.

Worked great. Fit as described. Directions pretty easy to follow

Parts arrived in good shape and met the specs I required.I would use them again.