RAM Torque Mount 1" Ball Black 1 1/18 Inch-1 1/12 InchRAM Torque 1 1 8" 1 1 2" Diameter Handlebar Rail Base with 1" Ball The RAM Torque handlebar and rail mounting base has a 1 rubber ball and accommodates bars 1 1 8 to 1 1 2 in diameter. Sizing inserts are included to provide a snug fit and protection of the rail. The mount utilizes nylon insert locknuts to prevent loosening in high vibration environments. Mounting Base Dimensions: Accommodates rails 1 1 8" to 1 1 2" in diameter RAM B 408 112 15U