Check the listing for details. 1/2" NPT Female Solid Brass Three Piece Pipe Union Fitting Adapter. Color: Yellow, Condition: New. Listed at 16.49 USD. This is a 1/2" NPT Female Solid Brass Three Piece Pipe Union that measures approximately 2" in length (threads fully compressed). These unions work great to connect two pieces of pipe or other fittings that use NPT ends as one side is able to thread onto the pipe without spinning the whole fitting. If you have any questions about the sizing or anything else, don't hesitate to contact us. Please see below for more specifications.This is a 1/2" NPT Female Solid Brass Three Piece Pipe Union that measures approximately 2" in length (threads fully compressed). These unions work great to connect two pieces of pipe or other fittings that use NPT ends as one side is able to thread onto the pipe without spinning the whole fitting. If you have any questions about the sizing or anything else, don't hesitate to contact us. Please see below for more specifications.