Product description  ONLY compatible with UltraHD Stainless Steel Top Worktable (SHE18308) Solid polyurethane wheels with brakes Wheels have threaded inserts (screw-in style wheels) These wheels are NOT compatible with the shelving systems or utility carts Certified by the NSF to NSF/ANSI Standard 2 - Food Equipment; for home, commercial and office environments   Specifications  Set of 4 Wheels Dimensions: 4" diameter (all with brakes) Stem type: Threaded (screw-in) Weight capacity: 500 lbs. Weight: 5 lbs. Model no: SHE18308WH