This Archer 20" guide bar is a very high quality professional guide bar. The bar uses a 3/8" pitch .050 gauge saw chain with 72 drive links. This guide bar works on the large Echo models like the CS510EVL, CS550EVL, CS610EVL, CS590, CS600P, CS620P, CS650, CS650EVL,CS660, CS670, CS680, CS701, CS702, CS750, CS8000, CS800P, please look at the photo for other Echo models this bar fits. Note: This guide bar uses a 3/8" pitch, .050 gauge chainsaw chain with 72 drive links. The Echo 20" OEM guide bar takes a 3/8" pitch, .050 gauge chainsaw chain with 70 drive links and many users consider this 72 drive link guide bar as an upgrade because a 72 drive link chain is more common then a 70 drive link chain. The large cc Husqvarna, Stihl, Jonsered, RedMax, Dolmar, Makita, etc chainsaws running a 20" guide bar with 3/8" pitch chain also use a 72 drive link chain.
This guide bar also works on Poulan models 203, 245, 3400, 360, 361, 3700, 3750, 3800, 3900, 395, 400, 4000, 4200, 4400, 450, 4900, 5200, 5400, 5500, 670
John Deere: 055SV, 50AV, 50V, 51SV, 55V, 60V, 65, 65SV, 66SV, 70V, 800V, 80EV
Archer Guide bars, Archer Chainsaw Chain and Archer Accessories are sold world wide and are known for quality products!