Includes (3) 581643678 Cutting Chains. New, retail packaged. Please consult owners manual for proper fit and identication. SP33G is a standard sequence, semi-chisel cutter, and round ground chain that can be sharpened with 3/16 files. This low kickback chain has 78 drive links and is compatible with 20 bars. The chain is especially suited for demanding consumers and everyday professional use. The .325 pixel pitch and .050 gauge (Narrow Kerf) chain provides a narrow cut, low weight, and enhanced cutting efficiency. Compatible with the Following: 435, 440, 445, 450, 450 Rancher Includes (3) 581643678 Cutting Chains. New, retail packaged. Please consult owners manual for proper fit and identication. SP33G is a standard sequence, semi-chisel cutter, and round ground chain that can be sharpened with 3/16 files. This low kickback chain has 78 drive links and is compatible with 20 bars. The chain is especially suited for demanding consumers and everyday professional use. The .325 pixel pitch and .050 gauge (Narrow Kerf) chain provides a narrow cut, low weight, and enhanced cutting efficiency. UPC 024761026215 Pitch 0.33 Inches Brand Name Husqvarna Chain Type Low Profile Unit Count 3.0 Count Item Length 20 Inches Item Weight 2.1 Pounds Chain Length 20 Inches Manufacturer Husqvarna Model Number 581643678 Drive Link Count 80 Manufacturer Part Number 581643678