Please see all pictures, This is a replacement kit for the NON decompression valve cylinder models.
Fitment: Stihl 034, 034AV, 034SUPER and MS340 chainsaws, Stihl 036, 036, MS360 chainsaws
Diameter: 48mm
Replace Part # for 1125 020 1215, 1125 020 1213
Feel free to ask questions. What you see is what you will receive.