Maxline M7510 Outlet Kit for 3/4-Inch Tubing with 1/2-Inch NPT Outlet Port Kit includes: Aluminum block, M8005 Maxline adapter fitting, drain and plug for unused port 175 psi maximum working pressure Front, top and back of block are ported 1/2-Inch female NPT thread Anodized Aluminum Use only with Maxline 3/4-Inch system