The alm bd139 replacement spool and line is a genuine strimmer accessory designed specifically for black and decker twin line reflex grass trimmers. Manufactured in the uk by alm, this replacement spool provides a reliable solution for keeping your grass trimmer operational and ready for garden maintenance tasks. This spool and line assembly is compatible with a comprehensive range of black and decker reflex plus twin line models, including the gl315, gl337 sb, gl350, gl500, gl546sc, gl600, gl650 sbc, gl651sb, gl652, gl653, gl655, gl656, gl660pc spc, gl670pc spc, gl675, gl680, gl685, gl686, gl687, and gl690 series. It also fits the grass hog gh600 twin line model, ensuring broad compatibility across the black and decker range. The replacement spool comes pre wound with 1.5mm diameter trimmer line, offering 5 metres of cutting line ready for immediate use. This product directly compares to original black and decker part numbers a6441, 597862 00, and 575462 00, making it a cost effective alternative for maintaining your grass trimming equipment. Features and benefits bull uk manufactured quality for reliable performance bull pre wound spool for quick and convenient replacement bull compatible with multiple black and decker reflex plus models specifications spool type spool line line diameter mm 1.5 length m 5 brand suitability black decker