A budget-saver! This air source will power your air tracks just as well as the more expensive unit-but at a fraction of the price. The 1½ horsepower motor will keep air carts floating freely for all dynamics experiments. Sound output is similar to that of an ordinary shop vac blower. If sound is an issue, this compact unit is easy to encase in a noise-dampening box or cabinet. Hose length is 4 feet. Recommended for Economy Choice Air Track AP6061 and Air Table AP5667. AP7528 Hose Adapter is required to connect AP6527 and AP6061.