Set of 12 rings for document envelopes, in blue and black, ideal for office storage, school or professional environments. Each protocol recorder is equipped with a stop-off lock to keep documents in place and ensure an optimal organization. Thanks to the protective box, the content is protected from dust and damage. Their high capacity makes them perfect to store large amounts of documents. Technical Specifications: Quantity: 12 collectors Color: blue/blue and black Material: Rigid cardboard Closure: Ring mechanism with lock-offs Size: Suitable for A4 document and sheet envelopes Capacity: High, perfect for mass storage Accessories: Protective box for closure and preservation Usage: Office, school, archive