STIHL chainsaw chain guide For models: 020 , 021 , 023 , 025 , HT 56 C-E , HT 70 , HT 75 HT 100 , HT 101 , HT 130 , HT 31 , HTA 85 , HTE 60 , HT-KM MS 150 , MS 150 C , MS 192 , MS 192 C , MS 192 T , MS 192 TC , MS 193 MS 193 C , MS 193 T , MS 193 TC , MS 200 , MS 201 , MS 210 , MS 230 MS 241 , MS 250 , MSA 160 T Original part number: 40271826 Original part number: 1123-648-6600 STIHL MP