This set of 8 casters are compatible with Rubbermaid models 7570-L2, 7571,7580, WaveBrake & more Plug & play design, pull out the old casters & press in the new casters in to your mop bucket Floor safe non-marking wheels that are resistant to chemicals, cleaning solvents, steam & water The 3" diameter wheel has a soft tread that provides a quiet & Cushioned ride 150 lbs of capacity per caster, .6 of inch wide Socket-like stem are compatible with Rubbermaid mop buckets "These 8 casters are made with same materials & specifications of the OEM Rubbermaid mop bucket casters. Our casters are compatible with RUBBERMAID MOP BUCKET MODELS 7570-L2, 7571,7580,7581,7582 7583, WaveBrake & more. The socket-like stem measures .6 of inch in width & approximately 1.4 inches in length. The 3-inch diameter thermoplastic rubber wheels on these casters have a soft tread that provides a cushioned & quiet ride when in motion. These floor safe/protective caster wheels are resistant to chemicals, cleaning solvents, steam & water making it ideal for harsh environments *To install these casters, you will need to pull out the existing casters which are held in the bucket by friction. Once pulled out, proceed with inserting/pressing in the replacement casters until they are seated at the base of the swiveling section of the caster. Verify the inside diameter of the hole where the old casters were sitting prior to purchasing. *For large orders or questions regarding our casters, contact Mapp Caster."