Top Plate/ Hollow Kingpin Models Free Swivel • Total Lock Top Plate Swivel Models Load Height Inches Wheel Diameter Tread Width (Inches) (Inches) • Medical Equipment • Computer Equipment Wheel Bearing • Low profile, easy swiveling and smooth rolling. • Durable zinc plated finish • Non-marking grey TPR rubber tread • Foot activated total lock brake • Integrated thread guards • Dual ball bearing raceway • Precision Bearings in Wheels Our Dual wheel casters provide a low profile, easy swiveling and smooth rolling. Top Plate Swivel total Lock Models (Locks Wheel and Swivel) Wheel Tread Diameter Width (Inches) (Inches) Wheel Description Load Height Inches (mm) Swivel Radius Inches (mm) Wheel Bearing Hollow Kingpin Models Wheel Tread Diameter Width (Inches) (Inches) Wheel Description Load Height Inches (mm) Swivel Radius Inches (mm) Wheel Bearing Hollow Kingpin Total Lock Models (Locks Wheel and Swivel) Wheel Tread Diameter Width Wheel Description (Inches) (Inches) Load Height Inches (mm) Swivel Radius Inches (mm) Wheel Bearing Swivel Top Plate Pattern Bolt Hole Hollow Rivet Caster is provided assembled. Change HK01 code to HKU1 for unassembled. 1/2" I.D.