This port provides a 3" dressed port through your wall or other barrier with a thickness from 4 inches up to 6 inches in thickness. This port requires a drilled hole in your wall of 3 7/8" to accomodate the Wall Port. 
This port provides a 3" dressed port through your wall or other barrier with a thickness from 4 inches up to 6 inches in thickness. This port requires a drilled hole in your wall of 3 7/8" to accomodate the Wall Port.