Husqvarna 445 2-Stroke Gas PoweRed Chain Saw, 18-Inch Centrifugal air cleaning system removes larger dust and debris particles before reaching the air filter. This results in reduced air filter cleanings and improved engine life. Delivers lower fuel consumption and reduced exhaust emission levels in accordance with the worlds most stringent environmental regulations. Combined start/stop switch and fuel pump make the saw very easy to start. Easier access to chain tensioning device. CARB Compliant