Quatro 3" diameter heavy duty hose, sold in 25 foot (7.6 meter) lengths is the best possible hose you can buy for dust collecting purposes. This special hose is far superior to simple dryer hose. Basic dryer hose is thin and constricts under pressure, reducing the suction power at your collection point. Quatro heavy duty hose is strong and thick, which means suction power isn't wasted along its travels. It can be electrically grounded, and it is flammable resistant, both necessities for building codes nationwide.