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.