Compatible with Black+Decker models: 82300, 82310, 82312, CST500, CST800, GE600, GE800,GL250, GL310, GL360,GLC500,ST200, ST300, ST400,ST1000, ST3000, ST4000, ST4050, ST4400, ST4500, ST5000, ST6500, ST6800, ST7600 Practical Tool For RS136, for RS-136, for RS-136-BKP, for RS136BKP, for143684-01. Cap type: for 682378-02. Replacement spring model: for 68223500. Save Money and TimeAerodynamic shape allows less drag for more efficient cuts .With the auto feed system, the replacement spool eases the tedious work of hand-winding spools. Premium QualityIt made from twisted copolymer nylon resin and synthetic ,Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces. More healthier and greenerIts good for your grass.It superior to the standard round line by producing an improved cutting action, which helps to keep grass healthier and greener.