Larger 201 STAINLESS STEEL BALL in ABS bracket not only withstands wet environment but also rolls more smoothly compared with other small balls. Low profile casters 't raise too much height(only 1inch) and yet can support a good amount of weight( 28 lbs per wheel). 28 lbs each wheel. Total 110 lbs for 4 wheels. Wheel Size: Total height 24mm (1 inch) , mounting plate diamater 44mm (1-3/4 inch), mounting hole diameter 4mm, distance between diagonal holes 36mm. PEEL & STICK! DONE! Install adhesive swivel wheels on the bottom of mop bucket or the feet/legs of such as coffee table, shelves, cabinets, dressers, plant stands with included adhesive pads or screws. Make moving bucket and furniture quick and easy. Tips: 1. These castor rollers only work on smooth and hard surfaces, may leave tracks on wood surfaces. 2. We suggest you use screws to install casters wheels for heavy objects. Not only for furniture such as storage containers, cabinets, cupboards, night stands but also for mop