RAM 3" Max Width Clamp Base with 1.5" Ball - RAM-247U-3

The RAM-247U-3 is a clamp base with 1.5" rubber ball that will connect to rails up to 3" maximum in width. Specs & Features Material:Powder Coated Marine Grade Aluminum Ball 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 for C Size 1.5" Balls - RAP-201U-B RAM 18" Rigid Aluminum Rod Arm with 2 (qty) Single Open Sockets for 1.5" Diameter Balls - RAM-316-2U RAM 1.5" Ball Medium Length Double Socket Arm with 2.5" Round Base AMPs Hole Pattern) - RAM-103U RAM 1.5" Ball Short Length Double Socket Arm with 2.5" Round Base AMPs Hole Pattern) - RAM-103U-B RAM 1.5" Ball Short Length Double Socket Arm with 75mm X 75mm VESA 3.625" Plate - RAM-103U-B-2461 RAM 1.5" Ball Long Length Double Socket Arm with 75mm X 75mm VESA 3.625" Plate - RAM-103U-D-2461