The "DEN DRYER KIT"(#DDK) adapter has been specifically designed to adapt to the Grizzly Dryer (#GP-1) in order to reach 3 different cages simultaneously. The adapter comes with 3 separate 8' long ducts made out of a very high quality Vinyl which are very flexible to reach most cages with a 4" opening, yet very durable in construction to last for years! The ends of the ducts have their own control adjustment vents that can adjust the amount of natural air to be released in each of the 3 cages separately, all the way to an "off" position!