Features 1/2" top plate, 1" king bolt and axle. Embossed 3/8" legs welded to yoke base. Top plate measures 5-1/2"W x 7-1/2"L, bolt hole is 3-3/8" x 5-1/4", slotted to 4-1/8" x 6-1/8". Roller bearing. Rugged and dependable. Zinc plated. FOB Shipping Point. Steel surcharge may apply. Wheel Description PAYRON - Cast iron steel. PLEXITE - Black phenolic. PAYTHANE - Red 95 Poly, metal center.