The Big Horn 11112 is a 6 Inch Plastic Joiner Dust Hood. This hood is 6-1/4 by 6-1/4 with a 4 Inch round Dust Port and has a 1-1/2 Inch high flanged opening to accommodate 4 Inch dust hose. This is made of heavy-duty 1/8 thick plastic. Features: * Durable plastic construction * 4 Inch Dust Port What"s in the Box: * Big Horn 11112 6 Inch Jointer Dust Hood