RAM 1.5" Ball Base with Strap 1" to 2.1" Diameter - RAM-108BU

The RAM-108BU consists of a 1.5" diameter ball connected to a base with single strap. The strap will accommodate rails from 1" to 2.1" in diameter. Specs & Features Material: Powder Coated Marine Grade Aluminum Ball Size:1.5" Rubber Ball SizeNote:The "U" in the part number reflects product packaged in poly bag. Weight:0.3 lbs. Strap Dimensions:1" to 2.1"   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.