VEVOR Pond Aerators, 6.7CFM Aeration System for Lakes up to 3 Acres, 1 HP Air Compressor, 4 Diffusers & Four 100' Weighted Tubing, Outdoor Pond Aeration Pump for Deep Water Oxygen CirculationThickened Aluminum Alloy ShellAnti-Vibration Rubber Feet≤68dB Low Noise Operation100 ft Self-Sinking AirlineBuilt-In Safety FeaturesYear-Round UseStainless Steel Coil Diameter: 0.2 in / 6 mm,Air Hose Diameter: 3/8 in,Air Hose Length: 100 ft / 30.5 m,Outer Ring Outer Diameter: 12.2 in / 310 mm,Outer Ring Diameter: 11.8 in / 300 mm,Operating Environment Temperature: 23~104 ℉ / -5~40 ℃,Nano Tube Diameter: 0.6 in / 16 mm,Power Supply: 120V / 60Hz,Noise Level: ≤68 dB,Max Airflow: 6.7 CFM @ 0 Mpa,Operating Environment Humidity: 20%-80%,Compressor Dimensions: 10.6 × 6.3 × 8.5 in / 270 × 160 × 215 mm,Rated Speed: 1660 rpm,Working Pressure: ≤0.3 Mpa,Inner Ring Diameter: 5.9 in / 150 mm,Item Model Number: OLF750D-150BS-Q3E,Product Net Weight: 86.4 lbs / 39.2 kg,Motor Power: 1 hp / 745W,Middle Ring Outer Diameter: 9.1 in / 230 mm,Inner Ring Outer Diameter: 6.3 in / 160 mm