This Oregon replacement 20" (50cm) guide bar and chain combination is designed to fit a variety of chainsaw models, and features a 78 drive link chain with .325-inch pitch and 0.050-inch gauge. This makes the replacement combo ideal for professional commercial users and experienced DIY-ers. The low-vibration micro chisel cutters offer excellent performance, easy maintenance and low kickback. The premium quality, lightweight and long lasting guide bar features a multi-rivet nose for durability and control. Features LubriTec - Oregon's next-generation oiling system, designed to extend the guide bar and saw chain life. Compatible with: CRAFTSMAN 316.35022, 316.38020, 316.38098, 358.35094, 360.35200, 360.35201, 41560, 41AY462S793, CMXGSAMY462S, S205 ECHO CS-4510 HUSQVARNA 133, 140S, 154, 234, 238, 242XP, 246, 254, 257, 261, 262, 340, 345, 346, 346XPG, 350, 351, 353,357XP, 357XPG, 359, 359E-TECH, 360, 362 XP, 40, 42, 435, 44, 440, 450, 450E, 455 RANCHER, 460, 49, 50, 51, 543XP, 545, 545 MARK II, 55, 55 RANCHER, 550XP, 550XP MARK II, 550XPG, 555, 57 MAKITA DCS430, DCS431, DCS46018, DCS510, DCS5200I, DCS520I, DCS540, DCS6000I, DCS6800I, DCS9000, EA5600F MCCULLOCH MS 1846, MS 1849AV, MS 2046AV, MS 2049AV, Pro Mac Series 1845AV, 40, 46, 4700, and 2046AV, Timber Bear 20 And many more. Discover the full list of compatible models on the Oregon Part Finder. Saw chain identification: Always refer to the number stamped on the drive link of your old chain to assure correct gauge and pitch, or refer to your owner’s manual, to order the correct part to fit your saw chain. Chain gauge is the drive link's thickness where it fits into the guide bar groove, matching the guide bar gauge Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by 2 Your guide bar length is stated in the manual, and is the length of the long bar from end to tip (not the full length of the chainsaw). See Oregon’s fitting guide.