4" Polyurethane on Aluminum Wheel SKU# 4-4-POLY-ALUM $25.20 QTY Add to Cart Volume discounts are available for bulk or frequent orders. Contact Us. Specifications Weight Capacity 700 lbs. Wheel Diameter 4" Wheel Width 1-1/2" Wheel Material Polyurethane Core Material Aluminum Jump to Full Product Specification Lead Time to Ship, Shipping & Returns Lead Time to Ship: 3-5 Business Days Ship Weight: 1.15 lbs 30 Day Returns Returned product is subject to a 30% restocking fee.