Quiet & No Marks: Soft rubber treads with ball bearing swivel for super smooth and non-marking mobility. No scuff marks on the floor. Wide Applications: Perfect replacement wheels for utility cart, Rubbermaid Libman mop bucket, Weber grill, shop vac, craftsman stool, dolly, workbenches, laundry cart, hospital bed etc. Specifications: Material: as shown in pictures Color: as shown in pictures Size: approx. 4 inch/ 10 cm Package includes: 4 x Stem Caster Wheels Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.