Spool Model: A6441, Cap Model: A6442-XJ. Size: 12.2m spool, 1.65mm diameter. Compatible Brushcutter Models: For Black & Decker GL315, GL337, GL350, GL650, GL651, GL652, GL653, GL655, GL656, GL660, GL670, GL680, GL5530 brushcutters. QUALITY MATERIAL SUPERIOR: Quality nylon cord, durable and allows for faster cutting. Flexible and strong, it allows the line to stretch and absorb shocks on hard surfaces. EXCELLENT MANUFACTURING QUALITY: Professional CNC cutting and automatic winding are safer and faster than manual winding, reduce damage to the mower and do not block the mower while mowing. EASY INSTALLATION: Installing the spool is very simple: just turn off the engine, remove the cover, place the distributor back in the cutting head, replace the cover and you're done.