This genuine oregon chainsaw chain uses chain type 21 .325 1.5mm 0.58and has 60 drive links. The chain is 14 long and is perfect for replacing broken or worn out chains.suitable for the following modelsal ko 1074, p21, p26, p28husqvarna350, 351, 353, 355,133, 136, 137, 140, 141, 142, 154, 234, 238, 240, 242, 234, 246, 254, 257, 261, 340, 345, 346, 350, 351, 357, 359, 360, 444, 450, 455, 235, 340, el16, el2400, el1500, el1600, 460,154, 254, 257, 261, 262, 362, 357, 359, 560xp, 455, 55jonseredel14, el 1200, 45e, 49sp, 50, 52, 2014, 2015, 2016, 2012, 51, 370, 380, 410, 420, 425, 435, 450, 451evs, 452, 490, 455, 450, 451, 455, 510, 520, 521, 510, 520, 525, 535, 590, 2012, 2014, 2015, 2016, 2036, 2040, 2041, 2045, 2149, 2050, 2063, 2051, 2054, 2055, 2063, 2150, 2145, 2141, 2152, 2153, 2255, 2156, 2159, 2163makitadcs430, dcs520, dcs4300i, dcs5200i, dcs431, dcs520, dcs43001, dcs431, 45partnerel1450, el1650, 400, 410, 460, 360, 450, 500, 5000, 405, 450, 470, 510, 540, 465, 400, 495, 510, 540, 500, 545, minifarmersaw, p500, p5000, p5500, 1200el, 1400el, 1450, 1500el, 1650, 410, 460, 510oregon type 21 chain equivalent to carlton k2c, stihl rapid micro, stihl 25rm, husqvarna h27, em s27, windsor 58j, homelite 32 m58, gb sabre, tsc, excel 528, dolmar 83.