Weed Eater Spool Cap Replacement: Black & Decker GLC12 GL250 GL310 GL360, ST1000 ST4000 ST4500 GE600 CST800 ST6800 Fit For: 682378-02, 68237-02, 6823378-02,RS-136 Spool cap Dimension: Spool Cap 2.87 in length and 1.15 in hight; Made of high-quality ABS and nylon materials, flexible and durable, long service life, not easy to break Easy Installation: Each replacement spool is pre-wound and can be easily replaced in just a few seconds, saving time and effort. Assembly and disassembly are very simple, just clamp it into the right position, and then quickly and easily assemble it by hand, without the need for other tools More durable: String Trimmer Spool replacement spool utilizes centrifugal force and aerodynamics to reduce drag ,Achieve fast cutting and utilizes centrifugal force to feed the trimmer line as it is needed, Reduce wear and damage and extend service life Include : 2 x 682378-02 Spool Cap, 2 x Spring, replacement Decker Spool Cap Covers, Spool cap protects spring trimmer line fixed spool,prevent weeds from getting stuck inside,avoid damage to the weedwacker 682378-02 Spool Cover Caps Replacement for Black Decker ST1000 ST4000 ST4500 GE600 CST800 ST6800 String Trimmer, Trimmer Spool 682378-02 with Spring Parts (2 Pack)