Specs: Description: 3/8 LP Semi-Chisel .043 55DL , Pitch: 3/8″ LP , Gauge: .043″ Narrow Kerf , Drive Links: 55 , 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: R55 – 90PX Chain Compatible With/Replacement For: STIHL – 017, 018, 019 T, E140, MS170, MS171, MS180C-B, MS180C-BE, MS180C, MS191T, MS192, MS192 C-E, MS192T C-E, MS192T, MS193, MSE140 C-BQ, MSE140, MSE140C, MSE180 C-BE, Pole Saw: HT70, HT73, HT75, HT100, HT101, HT130, HT131, HT250