Check the listing for details. RAM 1" Ball Base with 1/4"-20 Threaded Hole. Condition: New. Listed at 12.78 USD. 1" Ball Base with 1/4"-20 Threaded HoleFEATURES- Universal threaded hole solution for a variety of use cases- Included B size 1" RAM® rubber balls allows for connection to any B size RAM® double socket arm; ball and socket technology allows for near-infinite adjustability- Made of Powder-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments- Backed by a lifetime warrantyOVERVIEWThe RAM-B-337U consists of a 1/4"-20 female thread hex hole connected to a B size 1" rubber ball, allowing you to take advantage of the RAM® ball and socket system in a variety of applications.THREAD PITCH1/4"-20 x 5/8" (female)BALL/SOCKET SIZEB Size (1")WEIGHT CAPACITYStandard Use: 2 lbsHeavy-Duty Use: 1 lbMATERIALSMarine-grade aluminiumPACKAGING TYPEPoly BagWEIGHT0.03 kg