Check the listing for details. RAM-200-1U RAM Single Socket Arm with 1/2" NPT Female Hole & C Size 1.5" Socket. Condition: New. Listed at 45.49 USD. RAM-200-1U RAM Mounts Single Socket Arm with 1/2? NPT Female Hole for C Size 1.5? BallsMUST BE UNOPENED AND UNUSED TO QUALIFY FOR RETURNSPECIAL NOTE: THIS PRODUCT FEATURES A 1.5-INCH C-SIZED SOCKET. IT WILL NOT FIT A RAM-MOUNTS 1-INCH B-SIZED BALL. FOR B-SIZED VERSION, PLEASE SEE THE RAM-B-200-1UThe RAM-200-1U includes a single socket that will accommodate 1.5-inch balls and a 1/2-inch NPT Female thread. This part will connect to 1/2-inch NPT Male threads, including RAM-PA82XX rigid arms.Material: Powder Coated Marine Grade AluminumBall Size: 1.5-inch Rubber Ball SizeNote: The “U” in the part number reflects product packaged in poly bag.NPT Thread and Pipe Sizing: NPT (National Pipe Thread) is a standard used in joining pipes and fittings that have a tapered thread. As a general rule, the NPT inch size is the inside diameter of the threaded pipe and is known as the NPS (Nominal Pipe Size). The outer diameter (OD) of the pipe is shown in the table below:NPT Size(NPS) Pipe Outer Dia. (OD)Threads per inch1/4"0.540"181/2"0.840"141"1.315"11.5 Weight: 6 OZ MUST BE UNOPENED AND UNUSED TO QUALIFY FOR RETURNASK US ABOUT COMBINED SHIPPING for multiple items purchased in the same transaction! OUR REFUND POLICY: For new items, returns for UNOPENED products within the United States will be accepted within 30 days. Once an item is opened, it is not returnable. USED ITEMS (items sold as "open box" or "used") and INTERNATIONAL ORDERS are not returnable. Original shipping expenses are paid to the shipping carrier and are not refundable. We respectfully ask that when returning an item, please use the CORRECT AND TRUTHFUL reason for the return. We reserve the right to refuse ANY return when the item has been opened, used or a false reason was given for the return. We also reserve the right to charge a 15% restocking fee for any return that is used, damaged, missing packaging, has open packaging, or is missing parts.