Boxes manufactured in New Zealand by Acuflo are made of Superior Strength Polypropylene, Large top & bottom flange for max strength underload, Stainless flexi cable to secure lid + metal detection rods, superior antislip pedestrian tread pattern design exceeds AS/NZ 3661:1. Square corners provides for better compaction and ease of paving. Extensive optional base range adds strength while securing and protecting components. Polypropylene lid has colour and marking options while providing better deflection characterists and faster recovery time to original dimemsions than polyethylene product.