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GMC Sierra
**requires E66066 adapter cable to go the Raymarine a
Brass and copper elements
Mounting Hole: Accept #10 (M5) Screw
RAM Mount 1/4"-20 Female Threaded Hole w/1" Ball [RAM-B-348U] Marine Navigation & Instruments | Compasses GMC SierraRAM 1 4" 20 Female Threaded Hole with 1" Ball The RAM B 348U includes a 1 4" 20 female thread connected to a 1" rubber ball. Material: 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.
