American Dryer recess kit for all extremeair and global series hand dryers reduces the depth of the dryer to less than 4-inches from the surface of the wall on all models.. This kit includes (1) stainless steel recess box, (4) #8 x 1-1/2" stainless steel wood screw, (4) #10 flat washer, (4) #10-32 nut with nylon insert. Warning: Disconnect power before installing