2PCS Chainsaw Piston Rings Set 1.2mm x 42.5mm for STIHL 025 MS250 MS 250 Chainsaw 1123 034 3006 Replacement Spare Parts
https://www.vogueparade.com/shopping/EN/12503/1/4000206464332/2pcs-chainsaw-piston-rings-set-12mm-x-425mm-for-stihl-025-ms250-ms-250-chainsaw-1123-034-3006-replacement-spare-parts//