Brand new ARO style 3/8" MNPT coupler plug. This is an ARO Style coupler plug. This is a high quality steel plug made by Prevost. These plugs are made in Italy and meet the highest standards for quality and performance. These are some of the most durable, solid steel plugs that you can find. These plugs are more resistant to crushing and marring when being dropped, which is important because a quality plug can increase the life of your couplers!