Toekick port option made for 2X6 wall construction, works with all powerpipe subwoofers, except the 1500PTM. The tube size is 4” and has a 90 degree entry. Unit features a 2.75” x 14” in-room opening and a 8" clearance from flange edge to tube. Overall toekick depth15.5" (394mm) - generally used for behind wall mounting.