View cart “5″ POLYURETHANE 1-5/8″ EXPANDING STEM SWIVEL CASTER WITH TOP LOCK BRAKE FOR WORK TABLE. – QTY 4,Caster Kit • Work Table Pop Box • Includes (4) 5″ Diameter Expanding Stem • Fits 1-5/8″ OD Tubing • Non-Marking Polyurethane Tread • Top Lock Brake • 300 Lb. Capacity • Resistant To Acids And Caustics • Double Ball Bearing • Operational Temp Range -45º To 180º F • Zinc Plated” has been added to your cart.