With dependability and an anti-vibration system, this mid-range chainsaw's fuel-efficient engine increases run time between refuelings by 20% compared to the previous model. Another high-tech STIHL chainsaw, the MS 291 is built around a fuel-saving engine with long run times and low exhaust emissions. The advanced pre-separation air filtration system perceptibly relieves the downstream filter components, increasing the life of your air filter. Another great comfort feature is an anti-vibration system to provide you with a more comfortable working experience. It is truly a force to be reckoned with. Note: Not Available for purchase in California. Specifications Displacement 3.4 cu-in Power 2.80 kW Engine power 3.80 HP Device weight without refuelling 12.4 lb 1) System weight without refuelling 7.01 / 6.88 / 6.62 / 6.73 kg 2) Power-to-weight ratio 2 kg/kW Bar length 20 / 18 " 3) Groove width 63 / 50 " Saw chain pitch .325" Device length with bumper spike 450 mm 1) 1)without guide bar and saw chain2)with guide bar and saw chain3)The actual cutting length is shorter than the specified bar length