This lightweight 16mm. take-up spool is designed for Eiki/ Elf projectors. It is 15 " (38 cm) in diameter and is of special lightweight construction designed for Eiki / Elf spool arms.

A heavy steel projector spool may stretch and strain the rubber belts found inside Eiki / Elf projector spool arms when the spool becomes fuller and therefore heavier. A lightweight spool will help avoid this with your Elf.