20" Replaceable Sprocket Nose Bar / Silver Streak R3502072-4176SSPack Size:1GB EX20-50PA, Oregon 200GNDD176, Oregon 200RNDD176Laser 41006, Rotary 4702, Sandvik 20UXL50STA, Stens 075-207, Stens 075-534, Tilton T027PV4Craftsman 35145, 35212, 35483, 35608, 35609, 35690, 35721, 35727, 35728, 35826, 35829, 35851, 35881,35885, 35887 and 35889; Dayton 2Z462, 2Z462A, 2Z463, 2Z561, 2Z971, 4Z251, 4Z251A, 4Z3967, 6Z826 and 7Z627; Echo CS60, CS60S, CS451, CS452, CS500, CS501, CS501EVL, CS510, CS510EVL, CS550, CS590 Timberwolf, CS600, CS600P, CS601, CS602, CS610, CS610T, CS620P, CS650, CS660, CS670, CS680, CS701, CS702, CS706, CS750, CS5500, CS6700, CS8000, QV670 and QV8000; Green Machine 7600 and 7700; John Deere 055SV, 50, 50AV, 50V, 51, 51SV, 55, 55V, 60, 60V, 65, 65SV, 66, 66SV, 70, 70V, 80, 80EV, 800 and 800V; Lombard AP42, Comago, CS3500, CS3501, CS3502, CS3503, Lightning III and Super Lightning; McCulloch 55, 57, 60, 80, 560, 570, 605, 610, 650, 700, 800, 805, 850, 1000, 3720, 5700, 8200, CP55, C[70, CP70L, Double Eagle 50, Double Eagle 80, Eager Beaver 3.7, PM605, Pro Mac 55, Silver Eagle 3420, SP60, SP70, SP80, SP81, TimberBear, Titan 50, Titan 57 and Titan 70; Poulan 203, 245, 306, 360, 361, 365, 375, 380, 395, 400, 450, 670, 3400, 3600, 3700, 3800, 3900,4000, 4200, 4400, 4900, 5200, 5400, 5500 and 6700; Red Max G561AVS and G621AVS; Skil 1641; Tanaka ECS505, ECS506, ECS650 and ECS655Gauge: .050, Drive Links: 72, Length: 20 ", Pitch: 3/8", Type: Replaceable Sprocket Nose