This is a complete replacement for old Thetford waste dump valves. It has a 2" long 3-1/2" I.D. slip fitting on top for mounting to a pipe. On the bottom outlet side, it has a 1-3/8" long 3" spigot (3-1/2" OD). Made of ABS, the spigot is designed to be solvent welded into an ABS hub with a 3-1/2" ID. Blade is plastic. Comes with handle. This is version 08669 of Thetford valve 01447. Every Thetford valve ever made says 01447 on it, so you can't rely on the number molded into the plastic to guide you in selecting the correct version.