Polychem offers a wide assortment of plastic strap closures. The type of closure is influenced by the load or package characteristics. Low volume, low tension, light weight packages may be best joined with plastic or steel buckles that require no tools. Low volume, medium tension, heavier loads may best be tensioned and sealed with manual tensioners and metal seals. The heaviest loads may require manual combination tools, polyester strapping and metal textured seals.