This Archer 36" guide bar is a very high quality professional replaceable tip sprocket nose guide bar. The bar uses a 3/8" pitch .050 gauge saw chain with 114 drive links. This guide bar works on the large Echo models like the S451, CS452, CS500, CS501, CS501EVL, CS510, CS510EVL, CS550, CS5500, CS550EVL, CS610EVL, CS590 Timberwolf, CS60, CS60S, CS600, CS600P, CS601, CS602, CS610, CS620P, CS610T, CS650, CS660, CS670, CS6700, CS680, ,CS701, CS702, CS706, CS750, CS8000, CS800P and QV8000. This guide bar also works on Poulan models 203, 245, 3400, 360, 361, 3700, 375, 3800, 3900, 395, 400, 4000, 4200, 4400, 450, 4900, 5200, 5400, 5500, 670 is compatible with John Deere: 055SV, 50AV, 50V, 51SV, 55V, 60V, 65, 65SV, 66SV, 70V, 800V, 80EV Replaces Oregon part# 360RNDD176 Note: This is a solid steel guide bar that comes with a replaceable sprocket nose tip, the tip is not made by Oregon but an Oregon replacement tip will fit right on this bar. Archer Guide bars, Archer Chainsaw Chain and Archer Accessories are sold world wide and are known for quality products!