Adefol is committed to providing each customer with high quality products and friendly customer service. To ensure item fitment, please compare your original with our pictures and check the details. For Stihl MS251 chainsaw Replace part number for 1143 020 1207, 11430201207 Cylinder bore diameter: 44mm Spindle diameter: 10mm Includes : 1 x cylinder (has 4 bolt holes), 1 x piston, 1 x pin, 2 x ring, 2 x circlip Note: MS251 has two types, this cylinder only fits models from 2012 onwards with an intake manifold that only has a four bolt mounting (as shown in the picture). For Stihl MS251 chainsaw - Replace part number for 1143 020 1207, 11430201207 - Cylinder bore diameter: 44mm - Spindle diameter: 10mm - Includes: 1 x cylinder (has 4 bolt holes) , 1 x piston, 1 x pin, 2 x ring, 2 x circlip