OEM Part No:1626N4HC, SW1643SR, 16ST43SSR, 164MLEA074, 16D4CLSWHobby 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, MS192T, MS193T, 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