The RAM-313-DU is a marine grade aluminum rail mount base for a 1 inch rail diameter. This rail mount base includes a 1.5 inch diameter rubber ball. RAM-313-DU shown above. NOTE: Please see theRAM-313U for a 1/2 inch rail diameter. The RAM-313-DU Features and Options:
Warranty: Manufacturer's, National Products Inc., life time warranty.
Base Material: Black powder coated marine grade aluminum.
Base Ball Size: C ball sized 1.5 inch diameter rubber ball. Maximum suggested weight 10 lbs.
Included Base:RAM-313DU black powder coated marine grade aluminum rail base with 1.5 inch diameter rubber ball.
Fits 1 inch rail diameter.
Base Alternative Options Shown Below (Not Included):
RAM-235U shown below has two stainless steel u-bolts with 1.5 inch diameter rubber ball. The RAM-235U will accommodate a rail diameter from .75 inch to 1.0 inch.
Arm Length Options Shown Below (Not Included):
RAM-201U-B short "B" arm 2.25 inches from socket center to socket center, is available.
RAM-201U standard length arm 4.55 inches from socket center to socket center is available.
RAM-201U-D long "D" arm 8.75 inches from socket center to socket center is available.