Ultra-Life Rollers: Rated up to 55,000 cycles 10X more than standard rollers and reduces noise up to 75%. The Reinforced 6200Z bearing results in a longer lasting and quieter opening and closing of your garage door.
Ultra-Quiet™ Operation: the 13-ball Precision bearing reduces rotational friction between roller and shaft
Extra Quiet Rollers: reduces garage noise by up to 75% with a Precision 13-ball bearing and nylon roller wheels are much quieter than original equipment garage rollers
Ultra Lubrication: bearing lubrication groove contains Mobilgrease XHP™ 222 grease for enhancing bearing protection in low and high temperature applications (5°F to 300°F / -15°C to 150°C)
Verified Test Ratings: rated at 55,000 door open/close cycles at 110 pound load
Standard Size: 4-5/8" long shaft, 7/16" thick shaft, 1-13/16" wheel diameter, 1/2" wheel shoulder, 1/2" wheel thickness