The RAM-PA8218 is a 18" long rigid aluminum pipe that has a 1/2" NPT male thread at both ends of the pipe.

Material:
Powder Coated Marine Grade Aluminum

Note:
Part number reflects product packaged in clear clam shell for store shelf display.

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 inch
1/4"                                                      0.540"                                                 18
1/2"                                                      0.840"                                                 14
1"                                                         1.315"                                                 11.5