RAM Mount 1.5" Ball Base w/ Strap 0.5" - 2" Diameter [RAM-108B] Marine Navigation & Instruments | GPS - Chartplotters It also has connections for

It also has connections for an optional Rudder Reference Unit (sold separately

Double female ferrule - 4-1/2 in ferrule with 1in - 14 female threads at both ends

UPC: 753759250812

no drilling required

RAM Mount 1.5" Ball Base w/ Strap 0.5" - 2" Diameter [RAM-108B] Marine Navigation & Instruments | GPS - Chartplotters It also has connections forRAM 1. 5 Inch Ball Base with Strap 0. 5 Inch to 2 Inch Diameter The RAM 108B consists of a 1. 5" diameter ball connected to a base with single strap. The strap will accommodate rails from 0. 5" to 2" in diameter. Material: Powder Coated Marine Grade Aluminum Ball Size: 1. 5" Rubber Ball Size Note: Part number reflects product packaged in clear clam shell for store shelf display.