Compatible Brushcutter Models: For Black and Decker brushcutter, GL315, GL337, GL350, GL650, GL651, GL652, GL653, GL655, GL656, GL660, GL670, GL680, GL5530. Spool Model: A6441 Double Thread Spool. 12.2m long, 1.65mm diameter replacement brushcutter spool. Premium Material: Quality nylon cord, durable and cuts grass faster. Flexible and durable, allowing The line stretches and cushions the impact on hard surfaces. Excellent workmanship: Professional CNC cutting and automatic winding are safer and faster than manual winding, reduce damage to the mower, and do not jam when mowing. Precaution: When using this product, wear protective glasses and long underwear to avoid injury from overflowing wires. Remove the plug from the outlet before replacing, installing, or removing accessories.