Based on this product's specifications, here are some alternatives and similar models
Binding spines HERLITZ 32 mm, red, pack of 50
Summary description:
HERLITZ binding spines, 32 mm diameter, red, pack of 50. Designed for manual and machine binding of documents; suitable for binding reports, booklets and presentations with a moderate thickness. Compatible with standard 32 mm comb/binding systems, these spines secure punched papers into a bound booklet for organized document storage and professional-looking dossiers.