ATTENTION!!! This item ships by Dimension Weight Volume. We zero the item quantity to avoid shipping misquotes. Please call the store (800-940-3833) or email (sales@4fishstuff.com) for availibility and accurate shipping costs. Thank You. (FTFFA Web Sales) Gast Regenair regenerative blower line: Double-sealed, permanently lubricated bearings on many models minimize maintenance while maximizing performance. The design ensures exhausted air is always clean and oil-free. Integrated mufflers on single ended units minimize operating noise and eliminate the hazard of an exposed impeller. Strong fan cooling helps dissipate heat around bearings and impeller housing, prolonging bearing life and allowing cooler air delivery. Info from Gast