Guide Bars for 680ES Concrete Chainsaws Replacement Guide Bars for Ductile Iron Chainsaws 12" Guide Bar P/N 523383 Overall length: 19.5 Inches - 1" cutting depth. $159.95 Free Ground Freight Continental U.S. On all ICS Concrete Chainsaws, Chains, & Guide Bars Transit time estimate based on normal business days. All ICS Diamond Chains Buy any TWO ICS Diamond Chains and get a matching Guide Bar FREE Click here for 680GC Diamond Chains Chain Tensioning Tip Sheet Please Click Here Concrete Cutting Tip Sheet Please Click Here Chain Life Tip Sheet Please Click Here This ICS video shows proper chain tensioning.