18" 20bpx .325" pitch, .050 gauge pro-guard premium c-loop chain, 72 drive links, ultra low kickback chain, helps chain travel smoothly from cutter to cutter, fills gap between cutters & shields the depth gauge, minimal added feed force needed for good performance, meets ansi standards & ul classified, fits craftsman, cub cadet, echo, homelite, john Deere, Makita, mcculloch, pioneer, poulan, poulan pro, shindaiwa.