Genie 26966D Garage Door Opener Chain Idler Pulley Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; PMX300-IC/A,PMX300-IC/B,PMX500-IC/B,IC250,PMX65,PMX75,PMX85,IC250B,PMX80,PMX500-IC/A,ALC SERIES,PMX60,RCD SERIES Chain idler pulley 26966D guides the chain cable through the end of the rail closest to the door Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Genie This chain idler pulley (part number 26966D) is for garage door openers Shut off the electrical power before installing this part