The RAM-B-218-1 consists of a 1" ball and 0.25" NPT female thread. This part connects to any 0.25" NPT male thread, including RAM-PF-585-X flex arm series mounts and RAM-PA54XX rigid arm series mounts.
Material:Powder Coated Marine Grade Aluminum
Ball Size:B Size 1" Rubber Ball
Note:Part number reflects product packaged in clear clam shell for store shelf display.