OEM 50430097000 KTM125 SX / 150 SX Almost Complete Cylinder Gasket Set. This was for a 2018 KTM 125 SX. A gasket or seal was used out of the kit. I do not know which was used by the mechanic. I have shown a picture of the included gaskets and seals. This may fit other makes, models, and size bikes, but it is the buyer's responsibility to ensure fit.