Vibration Dampening U-Bolt Vibration-Damping U-Bolt Steel Finish Zinc Plated Thread Size 1/4 In.-20 Thread Length 1 in Inside Length 1 23/64 in Length (In.) 1 59/64 in Inside Width 1 23/64 in Pipe Size (In.) 1/2 in Characteristics Cushion Design Provides Total Load Distribution Includes Cushion Two Nylon Lock Nuts U-Bolt