OREGON 72JGX091G 91 Drive Link Super Guard Skip Sequence Chain, 3/8-Inch Recommended saw sizes 3.0-6.0 cubic-inch (50-100cc)recommended bar lengths 16"-36" (40-90cm) Skip sequence: 72jgx: 3/8" pitch, .050" gauge 73jgx: 3/8" pitch, .058" gauge 75jgx: 3/8" pitch, .063 gauge X grind-enhanced grind geometry significantly improves out-of-box sharpness with substantial speed improvement in boring and bias (undercut) modes Blued cutters provide superior corrosion resistance Warning: oregon 72, 73, and 75jgx super guard chains may be capable of kickback that could result in serious injury to the saw operator or bystanders