Oregon Harvester 18HX097E Micro Chisel Chain Saw Chain Featuring best-in-class cutters and optimized for highly challenging jobs, Oregon 18HX saw chain delivers maximum cutting efficiency while minimizing your downtime. PRODUCT DETAILS Pitch .404", Gauge .080", 97 Drive Link Count Designed for 80 cm Harvester Guide Bars 18HX features Micro Chisel Cutters with small-radius working corners for precision performance and easy maintenance 18HX introduces thicker coined drive links for increased strength, larger rivets for lowered saw chain stretch, and a wider kerf for reduced guide bar bending Designed to outlast cold cutting conditions with patented saw chain steel 18HX delivers plenty of power and reliable cutting performance with less horsepower output 18HX operates best with 5/65 HP (min/max) power output 18HX operates best at 3000/8000 (ft/min) power output. Recommended: 8000 ft/min