STIHL MS 251 45.6 cc petrol chainsaw with chain bar Strong, compact chainsaw with up to 20% lower fuel consumption and up to 70% lower exhaust emissions than conventional STIHL 2-stroke engines without 2-MIX technology. Optimum operation and high manoeuvrability. Technical data bar length: 40 cm - 45 cm displacement: 45.6 cc vibration value left: 3.9 m/s vibration value right: 3.9 m/s chain pitch: .325 " CHOOSE FROM THE FOLLOWING CONFIGURATIONS: 1- 40 cm bar 2- 45 cm bar CZ