Torque™ 3/8" - 5/8" Diameter Mini Rail Base with 1" BallThe RAM® Torque™ handlebar and rail mounting base has a 1" rubber ball and accommodates bars 3/8" to 5/8" 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 for mounting to scooter mirror rails as well as vehicle headrests and other round rails within the stated dimensions. Mounting Base Dimensions:Accommodates rails 3/8" to 5/8" in diameterSpecs & FeaturesMaterial: Powder Coated Marine Grade Aluminum Ball Size: 1" Rubber Ball "B" Size Note: The "U" in the part number reflects product packaged in poly bag Weight: