RAM 1.25" to 1.875" Rail Clamp Base with 1.5" Ball - RAM-271U-12

The RAM-271U-12, round pipe base, consists of a 1.5" rubber ball connected that will connect to a pipe tubing diameter from 1.25" to 1.875" in diameter. Specs & Features Clamp Dimensions:1.25" to 1.875"Material: Powder Coated Marine Grade AluminumBall Size: 1.5" Rubber Ball Size Note: The "U" in the part number reflects product packaged in poly bag. Weight:0.55 lbs. Compatible With Compatible Arms and Mounts RAM Medium Length Double Socket Arm for C Size 1.5" Balls - RAM-201U RAM Short Double Socket Arm for C Size 1.5" Balls - RAM-201U-B RAM Long Length Double Socket Arm for C Size 1.5" Balls - RAM-201U-D RAM Double Socket Arm with RAM® Pin-Lock™ Security Knob and Key Knob for C Size 1.5" Balls - RAM-201-SU RAM Composite Double Socket Swivel Arm for C Size 1.5" Balls - RAP-200-2U  RAM Mount - RAM Composite Double Socket Swivel Arm for C Size 1.5" Balls - RAP-200-12U RAM Composite Medium Length Double Socket Arm for C Size 1.5" Balls - RAP-201U RAM Composite Short Double Socket Arm