18" Replacement 23666 guide bar for Atlas 80-volt saw model 56937 Quality Oregon guide bar replaces 23666 Atlas OEM factory chainsaw bar Fits Atlas models that use an 80V Battery-powered chain saw. Upgrades .043 gauge bars to .050 gauge for extended life Tension your chain right on the saw using the Intenz self-tensioning feature or still use tension screw on the saw Intenz® tensioning mechanism built into the guide bar itself Reversible for longer life Better control, less kickback 18-inch cutting length guide bar Specs - uses 3/8 low profile pitch .050 gauge (1.3mm) 62 drive link chainChain choices for this bar- click hyperlink on part number to view chain.91PX062__Oregon AdvanceCut chain91PXL062___Oregon ControlCut chain91R062___RipCut Ripping Chain91VXL062__Oregon VersaCut Pro Chain Product TypeGuide BarProp 65 DescriptionWARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov