Oregon Ref. 540393Stihl 024, 026, 028, 029, 031, 032, 034, 036, 036QS, 039, 039, 040, 041, 042, 042AV, 044, 045, 046, 048, 056, 064, 066, E15, E20, E220, MS240, MS260, MS261, MS261C, MS270, MS270C, MS271, MS271C, MS280, MS280C, MS281, MS290, MS291, MS291C, MS310, MS311, MS340, MS341, MS360, MS360C, MS361, MS361C, MS362, MS362C, MS380, MS381, MS390, MS391, MS440, MS441, MS441C, MS460, MS461, MS640, MS650, MS660, MS661 and MSE220Length: 20 ", Drive Links: 81, Pitch: .325", Bar Type: Laminate sprocket nose, Packaging Type: Branded sleeve, Gauge: .063