Product description Replacement spool cap compatible with BLACK+DECKER AF-100 and RC-100-P trimmers. [Design] Easy-to-replace spool cap design. Includes 4 or 6 replacement caps and 4 or 6 springs, suitable for routine maintenance and spare part storage. [Function] Designed as a replacement lid for AFS automatic feed spools, compatible with line trimmers using AFS spool systems. [Advantages] Made with advanced manufacturing technology for durable performance. Offers stable operation and high reliability. Ideal replacement for worn or damaged parts. Suitable for garden and agricultural use. [Easy] Simple installation process helps extend the life of your trimmer without the need for a full unit replacement. [Practical] Engineered for enhanced durability when trimming along edges and rough surfaces. Optimized design helps reduce noise and line vibration. Package Includes: 4 x Replacement Spool Cap Cover + 4 x Spring 6 x Replacement Spool Cap Cover + 6 x Spring