Security envelope for keys codes 400/pc

Security envelope for efficient and secure handling of keys and codes. Opaque security envelope for the storage and transport of keys and codes. Each envelope is uniquely numbered with numbers and barcode (code 128). The envelopes are provided with punched holes for storage in binders. The envelopes cannot be opened and resealed without direct exposure to heat, cold, chemicals or mechanical damage - Dimensions: 250x150mm+30mm