16, 33Sl ProGuard Premium CLoop Chain, 66 Drive Links, Ultra Low Kickback Chain For Both The Professional The Casual User, 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 Is UL Classified, Fits Echo, Husqvarna Poulan Chain Saws