Based on this product's specifications, here are some alternatives and similar models
Eyelet Folder A4 Barbara 0820111BN white 300g cardboard 50 pcs
Summary description:
A4 eyelet folder Barbara 0820111BN in white, made of 300 g/m² cardboard. Ready-to-use pack of 50 pieces featuring a reinforced eyelet (oczko) closure for quick binding of punched documents. Suitable for office, archive and school use to store, organise and protect reports, invoices and project files.