Use Discount Strut Accessories Alpha Series Electro-Galvanized 5" Pipes to secure pipe runs to any flat surface & distribute loads. The cushion design provides total load distribution, allowing U-Bolt to become a full contact hanger, eliminating knide-edge loading. The U-Bolt traps & secures the cushion in place to prevent lateral movement, while nylon insert locknuts provide positive lock. The product fits a 5" pipe & the diameter is 5.56".