The alm bd401 is a replacement spool and line designed for black and decker grass trimmers, offering a cost effective solution for maintaining your strimmer's cutting performance. Manufactured in the uk by alm manufacturing, this spool comes pre wound with 1.5mm diameter trimmer line, providing 9 metres of cutting line ready for immediate use. This replacement spool is compatible with an extensive range of black and decker models including the bgl250, gl310, and gl360, as well as models 82300, 82310, 82312, cst500, cst800, ge600, ge800, gl250, glc500, st200, st300, st400, st1000, st3000, st4000, st4050, st4400, st4500, st5000, st6500, st6800, and st7600. The spool compares to black and decker part numbers rs 136, rs 136 bkp, and rs 136 bkp 1, ensuring a direct replacement for your original equipment. Ideal for domestic garden maintenance and light professional groundswork, the 1.5mm line diameter provides a good balance between cutting power and line durability. The pre wound design eliminates the need for manual line threading, making spool changes quick and straightforward when line runs out or becomes worn. Features and benefits bull pre wound spool eliminates manual line threading bull manufactured in the uk for consistent quality bull compatible with over 20 black and decker strimmer models bull 1.5mm line suitable for general grass trimming applications specifications spool type spool line line diameter mm 1.5 length m 9 brand suitability black decker