Adjustable Long Plastic Chaff HL seal The Acme HL Seal is a smooth ribbon, plastic pull-tight seal manufactured from Polypropylene material. Product Specifics Marking Laser or Foil marking Consecutively numbered as standard Optional Customer name/logo Optional Laser Barcoding MATERIAL: Body – Polypropylene with Biodegradable additives. Insert – Spring Stainless Steel Airlines, Cargo, Trailers, Containers, Rail freight, Refineries, Warehouses, Cash bags, Postbags, Lockers Back