This is for one lightly used wall vent system. This allows an unheated or un air conditioned room to receive heat or A/C air from an adjacent room, yet keep your privacy. It is easy to install in sheetrock between studs and can be installed in less than an hour. This is not just a vent on one side. This system consists of two vent surfaces for each side of the wall and a square interior transition piece on each, where one slides into the other and fits various thicknesses of walls.
The wall vent dimensions are"
Height: 11 1/2" flange, 10 3/8" inside flange (hole size)
Width: 11 1/2" flange, 10 3/8" inside flange (hole size)
Thickness: Fits typical 2X4 studded wall Can be trimmed to fit thinner doors and walls
Only asking $20. If interested, please email me or call me. No texts as this is a land line.