OEM Part No: 1226N4HC, 12A074N4HC, SW1243SR, 12ST43SSR, 124MLEA074, 600757, 12D4HLSWHobby Champ 3/8LP – .043Fits Stihl models 009, 010, 011, 012, 015, 017, 018, 019, 020, 021, 023, 025, E10, E14, E160, E140, E180, HT70, HT75, Pole Pruners, MS140, MS170, MS171, MS171, MS180, MS181, MS190, MS191, MS192, MS200, MS200T, MS201, MS210, MS211, MS220, MS230, MS231, MS231, MS250, MS251Fits Alpina models ELETTRA 160/170, ENERGY 1.6, ENERGY 1.8, SINERGY 35, SINERGY 40, P360, P370, P390