Early Stihl 044 10mm slant fin, with 4mm recoil & cylinder cover screws. Completely rebuilt & ported, new bearings, seals, gaskets, lines, piston, etc. Less than 3 tanks since rebuild & port work. Everything is in working order. Very strong running saw. Has a triple port exhaust, no screen on the DP front cover, but both side ports have screens. $750 shipped & insured in the lower 48 states.