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This unique range has many special security features including tamper proof sealing and strong side welds. The white envelopes have a black opaque for 100% opacity, as well as the sequential numbering and barcodes for security tracking.
| Brand | Blake Packaging |
| Closure | Peel & Seal |
| Colour | Clear |
| Dimensions | 320x240mm |
| Envelope Grade | Light Weight |
| Gauge | 70mu |
| Manufacturer | Blake Envelopes |
| Material | Polythene |
| Opening | Short Edge |
| Size | C4+ |
| Tamper Evident | Yes |
| Type | Polythene Envelopes |
| Warranty | 5 Year Shelf Life |