Vibration Dampening U-Bolt, Vibration-Damping U-Bolt, 316 Stainless Steel, Finish Plain, Thread Size 1/2 In.-13, Thread Length 1 13/32 in, Inside Length 4 35/64 in, Length (In.) 5 3/64 in, Inside Width 4 in, Pipe Size (In.) 3 in, Characteristics Cushion Design Provides Total Load Distribution, Includes Cushion, Two Nylon Lock Nuts, U-Bolt WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. -