[SILENT & SMOOTH SLIDING]: The office chair wheels are made of durable rubber, they have a good cushioning effect and will not make a squeaky rubbing sound on the floor during sliding, which allows you enjoy the smooth and quiet rolling and stay focused on work or sturdy. Come on, give a whole new update to your old poorly made, squeaky and rickety desk chair wheels asap. Your body needs a relaxing seating.[PREMIUM & UNIVERSAL]: Our double wheels - caster system is durable enough to supports up to 500 lbs. It is designed for universal compatibility - offers a direct replacement solution for almost any rolling chair with 2 INCH standard stem. NOTE: It is not compatible with IKEA chairs and not either with some off brand chairs.[APPLICABLE TO ALL FLOORS]: Our computer chair wheels will never scratch, smudge or damage your floors. Of course, if the chair cushion must be used, the casters can also work well. Enjoy carefree and safe glide on wood, hardwood, laminate, vinyl, tile and carpet floors throughout the day.[EASY TO INSTALL]: Installation step is particularly simple, without using tools, simply pull off old casters from your office chair, then firmly insert the new casters and make sure they are be secured.[PERFECT SIZE] The outer layer of casters is made of rubber-like plastic material coated with soft polyurethane. This soft shell not only prevents damage to your floor, but also rolls freely on the carpet. Total height is 4.5 inches with wheels measuring 3 inches in diameter and stem 7/16 by 7/8 inches wide; 360 degree swivel; holds up to 650 pounds of weightameter and stem 7/16 by 7/8 inches wide; 360 degree swivel; holds up to 650 pounds of weight