Compatible with BLACK+DECKER RC-100-P trimmers. This 4-piece set includes trimmer caps and springs for convenient replacement and spare use. Designed to protect the cutting line and secure the spool in place, helping your trimmer perform effectively. Constructed from durable metal and plastic materials for reliable stability, shock resistance, and resistance to cold and oil. Suitable for use in patios, lawns, yards, gardens, crops, and landscaping applications. Specifications: Material: Metal, Plastic Spool Cap Size: 8.5 cm x 3 cm Spring Size: 2 cm x 1.8 cm Note: Measurements are manually taken; allow a slight variation of 1–3 cm. Color may vary slightly due to lighting and screen display differences. Actual product may vary slightly from images.