OREGON 75LPX072 Chainsaw Chain. Fits on the Stihl MS290, MS310, MS311, MS340, MS341, MS360, MS361, MS362, MS380, MS381, MS390, MS391, MS400, MS440, MS441, MS460, MS461, MS462, MS500i, MS640, MS650, MS660, MS661, 029, 030, 031, 032, 034, 036, 038, 039, 041, 042, 044, 045, 046, 048, 056, 064, 066, E15, E20, E220 & MSE220 models that have a 20" bar.
eBay