3M™ DBI-SALA® Confined Space HC (High Capacity) 84 cm Mast Extension is constructed of powder-coated aluminium and zinc-plated steel. This component is used to change the height of a davit arm system. When used as part of our complete system, this product is certified to EN795:2012, CEN/TS 16415:2013, EN1496:2012, and meets the requirements of machinery directive 2006/42EC for material handling.