Set of 4 NK Swivel Plate Caster with 3" x 1-1/4" Non Marking Soft Gray Rubber TPR Wheel Contains : 4 Pcs of 3" Plate Casters Wheels Size: 3 x 1-1/4" / Overall Height: 4-3/8" Material: Thermoplastic Rubber Gray Soft Rubber (TPR) Mounting Size: 2-1/2" x 3-5/8" top plate