The Black+Decker Trimmer Spool Cap and Spring Replacement for Select Black and Decker String Trimmers is made of high impact ABS plastic for durability and high quality. The spool cap and spring fits models: GH400, GH500, GH600, CST1000, CST2000, NST2018, ST7000 and ST6600. Easy to replace this spool cap and spring.
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