Based on this product's specifications, here are some alternatives and similar models
Spool for Fieldmann FZS 70105 replacement, model FZS 9106 (compatible)
Summary description:
Replacement spool compatible with Fieldmann FZS 70105 models, designated FZS 9106. Designed to hold cutting line for garden trimmers and brushcutters, this spool is a spare part for maintaining cutting system function. Useful for users needing quick replacement of worn or damaged spools to restore trimmer performance and continue garden maintenance tasks.