RAM Double 2.25" D-Ball U-Bolt Ball Base for 1.25" - 1.5" Rails RAM-D-235-1U

RAM-D-235-1U RAM Double U-Bolt Ball Base for 1.25" - 1.5" ...

RAM Dual U-Bolt Base with 2.25" Ball - Fits 1.25" - 1.5" Diameter Rails / Posts

RAM Mount Universal Flex Vehicle Floor Mount with 1" B-Ball Socket RAM-B-316-1U

RAM-B-217-1U RAM Dual Ball Base with 1/4" NPT Female Threa...

RAM-217-3U RAM Double Ball Adapter with 1/2" NPT Threade...

RAM-B-217U RAM Double Ball Adapter with Round Base - B S...

RAM Mount RAM-230U Aluminum Double 1.5" Ball Adapter