SPS 355 is a single-piece adjustable plastic strap seal designed for applications where fast, easy, and secure sealing is required. It is manufactured from high-quality polypropylene and offers reliable tamper evidence through its one-time locking mechanism. Each seal is individually identifiable with a laser-engraved 7-digit consecutive number, along with company name or logo and barcode, ensuring permanent and non-alterable marking. The flat strap design with a tapering tail allows smooth pull-up application through small sealing apertures. Once locked, the seal must be cut for removal, making any unauthorised opening clearly visible. SPS 355 is suitable for applications requiring compact sealing with clear visual tamper indication.