This white Central 90° Short Spigot is designed to be used only at the back of the 2x3 Inlet Mounting Plates #791044W due to the very limited space in a 2x3 wall.

One opening is female to mate with the back of the mounting plate while the other is male to fit inside of the standard "Schedule L" thin wall PVC pipe. For similar products see our list of Generic Central Parts & Components.