Recommended saw size: 38 to 62cc, bar length: 11-20-inch (28-50cm) * 20lpx: .325" pitch, .050" gauge; 21lpx: .325" pitch, .058" gauge; 22lpx: .325" pitch, .063" gauge * Blued cutters provide superior corrosion resistance and improved strength * "X" grind-Enhanced grind geometry significantly improves out-of-box sharpness with substantial speed improvement in boring and bias (undercut) modes * Warning: oregon 20, 21, and 22lgx super 70 chains may be capable of kickback that could result in serious injury to the saw operator or bystanders