" Package Includes: The package includes 4 cutting sleeves and 4 springs, which can meet your daily replacement and storage needs High quality materials: Made of ABS and carbon steel, durable, long service life, good stability, impact resistance, cold resistance and oil resistance Unique Design: After special design, the edge can last longer on the rough surface Aerodynamics can reduce noise and pipe jitter Unique Design: After special design, the edge can last longerlong on the rough surface Aerodynamics can reduce noise and pipe jitter Easy to Install: Easy to install and save the cost of buying a new mower Ideal for decks, lawns, yards, gardens, crops, landscaping, landscaping, etc Multiple Uses: Compatible with Black + Decker afs gh400, gh500, gh600, cst1000, cst2000, nst2018, st7000, st6600 and st7700 trimmer models It is suitable for agriculture, animal husbandry, aquaculture and forestry Product Description: -Made of high quality ABS + carbon steel, good stability, impact resistance, cold resistance and oil resistance - Simply put the cover on the valve body, the spring makes it difficult to fall off -RC-100-P replaces the bobbin cover used to use the auto-feed bobbin thread cutter - It provides protection for the coil to keep it from getting dirty -The pool cap is very small, lightweight and easy to carry Specifications: Material: ABS + carbon steel Color: As Shown Spool cover size: 8 6 x 3 4 cm / 3 39 * 1 34 inch Pen size: 2 3 x 3 6 cm / 0 906 * 1 42 inch Quantity: 4 pieces The package includes: 4 x Replacement Bobbin Caps 4 x Spring Note: 1 Due to the light and screen setting difference, the color of this item may be slightly different from the picture 2 Due to different manual measurement methods, please allow a slight difference in size "