Ring collector for envelopes blue and black documents, ideal for archiving in office, school or professional environments. The protocol recorder is equipped with a robust ring mechanism and a stop-off block, which prevents documents from moving inside. Its high capacity makes it perfect for storing a large number of documents. It is also provided with a protective box to protect its content from dust and external damage. Technical Specifications: Type: Ring Collector with Protective Box Color: Blue and black Material: Rigid cardboard Closure: Ring mechanism with lock-offs Size: Suitable for A4 document and sheet envelopes Capacity: High, suitable for a large number of sheets Accessories: Protective box for closure and preservation Usage: Office, school, archive