Compatible replacement for BLACK+DECKER AF-100 cover. 1. [Design] The replacement spool cap is easy to replace. Perfectly compatible with the BLACK DECKER RC-100-P trimmer. 4 or 6-piece cutting caps and 4 or 6-piece springs meet your daily needs for replacement and storage. 2. [Function] Replacement lid for the replacement spool, for use with line trimmers that use an automatic AFS feed spool. 3. [Advantages] Advanced production technology ensures longevity. Stable properties, high reliability. Perfect replacement for the defective part. Suitable for garden or agricultural use. 4. [Easy] Easy to install and saves you from buying a new trimmer. Ideal for terraces, lawns, courtyards, gardens, crops, landscaping, and professional landscapers. 5. [Practical] Specially designed to last longer on edges against rough surfaces. Aerodynamic design reduces noise and cable flutter. Package Included: 4 x Replacement Spool Cap Cover + 4 x Spring 6 x Replacement Spool Cap Cover + 6 x Spring