The Silver Bullet PRO is Sylvan's latest and greatest in ULV foggers; there are several improvements over the original Silver Bullet, which is Sylvan's entry level model. The PRO version has an advanced clear polymer coating on the tank and internals to give more chemical and wear resistance than before. In addition the PRO had improved handle grip and upgraded nozzles to improve the droplet size control and improve flow dynamics. Silver Bullet Pro Fogger Machine ULV Indoor Outdoor Tri-jet Non Thermal Cold Professional Model 2.0 Triple Jet Cold ULV (Ultra Low Volume) Cold (Non-Thermal) Fogger Features: Lightweight and Corrosion free Stainless Steel and Aluminum Construction Low, medium, large droplet size control for wet or dry applications 1 Gallon Plus Fluid Tank Excellent for use with non-toxic cedar oil products of occupied spaces, homes, air ducts, basements, garages, attics, warehouses,Greenhouses Words great with water based products, oil based products. The Silver Bullet PRO Triple Jet fogger was specifically designed to function for a very wide range of uses for both indoor and outdoor applications. 10-30 micron VMD, adjustable. Greenhouses, Food plants, hotels, homes, stores, barns, parks and hospitals are just a few examples of sites which right now depend every day on the Silver Bullet PRO. The Silver Bullet PRO is a creative improvement on other ULV foggers on the market. Not only does the Silver Bullet PRO boast a more powerful motor, allowing for up to 40 ft. of spray vs 30 ft. of spray, but it is also made of more robust materials than the competing unit like the "Commander".