This is a great box that hung on the wall and had Grinnell Sprinkler Heads inside. The patina on the wood is fantastic – never been refinished and has original lettering of “Grinnell Sprinklers To replace heads opened by FIRE General Fire Extinguisher Company Providence, R. I.”. The door still is in very workable condition, all original. Overall size of box is 10” x 11” x 3 ½” approximately. Inside the box there are 12 holes I am presuming are for sprinkler heads. This piece is a part of an interesting history.