Specs: Description: Chain Loop 3/8 LP Semi-Chisel .043 33DL , Pitch: 3/8″ LP , Gauge: .043″ Narrow Kerf , Drive Links: 33 , File: 5/32″ , This saw chain met the kickback performance requirement of ANSI B175.1-2012 when tested according to the provisions of ANSI B175.1-2012 low-kickback saw chain meets the kickback performance requirement of CSA Standard Z62.3 , Features the Centri-Lube oil distribution system to extend the life of your saw chain , Low-kickback semi-chisel saw chain for added safety , Out of package sharp and ready to cut; a sharp chain is a safe chain , Heat-treated and hard chromed cutters deliver a weather-resistant chain that cuts efficiently and extends chain life Replaces OEM Numbers: Oregon: R33 – 90PX Chain Compatible With/Replacement For: RYOBI – R4360, RY43160