Suitable for Black Decker: Suitable for; most mower models: GL280, GL301, GL425, GL430, GL545, GL555, GLC13, GLC2500, GLC2500L, GLC3000, GL4525, GL.4525S.B, GL4525S.B, GL4525S.B, GL28LC58LC58LC, STTC582LC505LC, STTC50558 EPC, STC1840, EPC, ST1823, etc.High quality trimmer line. : The 9.15m trimmer line allows for a larger trimming range, with a diameter of 1.65mm. The polyamide nylon line is durable and flexible. Not easy to break, to ensure continuous work.Quick and clean cutting: The replacement of the spool of the automatic feeding system facilitates the tedious work of manual winding of the spool. It uses centrifugal force and aerodynamics to reduce drag and achieve fast, clean cuts.Perfect Replacement Spool: Perfect replacement for most spool models. Black & Decker, such as A6481, A6485, AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. The valve core can be inserted and removed without tools, and the operation is simple. At the same time, avoid equipment damage and maximize line utilization.Value Package: Package includes 6 spare trimmer spools, 1 spare cap and 1 spare spring. The coil cap replaces the RC-100-P cap and the spring replaces the RC-100-P spring. Excellent quality ratio. price.