The Fogmaster Micro-Jet ULV 7401 fogger features precise adjustment of particle size, as small as 7-10 micron VMD, for ultra low volume application. The fogger covers 2-4,000 sq. ft. per minute. In addition, it can be adjusted to deliver larger droplets for space spraying and wet fogging. The Fogmaster handles both wet and oil-based liquids. Target Pests: schools, restaurants, zoos, barns, hotels, and similar Color: Silver Sprayer Type: Fogger Tank Size: 1 Gallon Material/Construction: Power head housing and tank - aluminum, Tubing - fuel and oil resistant vinyl, Fittings - brass, Control valve - glass filled nylon, stainless stem, Nozzle - Celconacetyl copolymer Spray Pattern: 7- 30 micron VMD, adjustable (ultra fine, dry fog to heavy, wet fog) Seal Type: Viton Special Features: light weight, 10-turn precision needle valve controls liquid output and droplet size, covers 2,000-4,000 cubic feet per minute, once the valve has been set, you can use the vernier calibration to return to the same setting, or snap a lock ring to prevent accidental changes, easily calibrated in the field to adjust for differences in liquid density, viscosity or surface tension. Warranty: Limited five year manufacturer warranty Versatile Ultra Low Volume Fogger: The Fogmaster Micro-Jet ULV 7401 fogger allows precise adjustment of particle size, under 7 micron VMD, for ultra low volume application. This allows use of more concentrated fogging solutions, and speeds up treatment time - at typical ULV application rates, the Micro-Jet covers 2-4,000 cubic feet per minute.) A 10-turn precision needle valve controls liquid output and droplet size. Set the valve to a low flow rate to produce near-invisible ULV droplets. For heavier fogs and mists, Increase the flow rate. Once the valve has been set, you can use the vernier calibration to return to the same setting, or snap a lock ring to prevent accidental changes.