Spring Loaded Swivel Caster - 8" x 2" Gray Rubber Wheel with Precision Ball Bearings - 300 lb. Capacity - 9-1/2" Overall Caster Height - Mounting Plate: 4" x 4-1/2" - Bolt Hole Centers: 2-5/8" x 3-5/8" slotted to 3" x 3" - Uses 3/8" Diameter Attaching Bolt - LEAD TIME ON THIS PRODUCT IS ABOUT 4 WEEKS