1.75 Inch ID x 262

Part arrived as expected, great instructions included, opener works great now. It is much quieter than before.

GENIE 3850R works very well with my GENIE receiver #315390R2 that I have operating an old Chamberlin opener. The receiver was not included in the installation instructions but they were the same as the first (A) instructions you sent. You probably know all this but just in case not I thought I would comment anyway. Thanks

very prompt, excellent buying experience

Double check the Manual to confirm it fits your door before buying. Look at the " Preparation/Planning section Page 3 " Silent operation, you can't hear the door operate for the any room in the house. " Very happy with this " Only took a few hours for me to install it alone. Shown it to a few people, I should get commissions. Easy to pair with accessories. Added 2 homelink cars, 4 2 button openers KLIK3U-BK, 2 remote light controllers 825LM, 1 Keypad 877Max, 2 Door buttons 883LM A great feature. The Smart Control Panel 880LMW (included) it has a motion sensor is built in. It turns on the remote light 827LM (included) and my 825LMs are connected to 2 LED shop lights. Instant Light and after 5 minutes auto off. I don't care about Wifi and did not set this up.

really nice like it better then the original one, work great thank you very much. the lite up keys show up real good at night cowboy Astran