The 4" E-Rite Sidewall Venting Kit is for use with the ER152-202 Heater. This venting kit includes installation instructions, a flue adapter, air pipe adapter, air inlet collar assembly, air inlet terminal, flexible steel re-enforced air hose, clamps, gaskets, and fasteners necessary to install the venting system. Made for easy installation and use, it will help ensure the best service life possible.