Service Caster 6" x 2" Thermoplastic Rubber Flat Tread Wheel Only with Roller Bearing - 1/2" Bore - 500 lbs Capacity per Wheel - Brand

6" x 2" Thermoplastic Rubber Flat Tread Wheel Only with Roller Bearing - 1/2" Bore - 500 lbs Capacity per Wheel - Service Caster Brand

AZSSMUK 1/2" Bore Solid Steel Style Zinc Plated Set Screw Shaft Collars

National Hardware N179-804 4005BC Smooth Rods in Zinc, 1/2" x 36"