Patriot Bottom Aeration System LLS-140, LL-140 Air Pump, 50' Weighted Tubing, (4) 8" Diffuser, T-Fittings Whisper Quiet Operation: Reliable, Oil Free and Extremely Energy Efficient Includes: (4) 8" Round Weighted Air Difussers. 50' of 3/8" Weighted Tubing. Necessary Fittings & Hardware. Discharge Outlet: 5/8"; Cord Length 6 Feet Output: 5.3 CFM. Maximum Depth 15'. Noise Rating (dB) 38. Volts 120. Watts 125 Frequency (Hz) 60. Dimensions (L x W x H) 10" x 8" x 10". (CFH = Cubic Feet Per Hour. CFM = Cubic Feet Per Minute). Indoor / Outdoor Use. 2 Year Warranty. Ships FedEx Ground or FedEx Home Delivery