RAM Mount Universal Finger Grip Cessna Rail Post Mount Includes: Plastic Universal Finger Grip Clamping Cradle, Diamond Plate with 1 inch Ball RAM-B-238U, Medium Arm B-Socket RAM-B-201U, 0.25 inch NPT Thread with Single 1 inch Ball, 12 inch Pipe with 0.25 inch NPT Thread Ends, Cessna Plane Rail Mount Base. P/N: RAM-B-131-UN4 SKU: RAMB131UN4 WEIGHT: 2lbs Reviews Videos