All our aluminium tent poles are made with hard structural aluminium which is anodised to protect it from harsh and salty enviroments. No blackening of canvas products or hands| means it is ideal for use in camper trailers and caravans or under a tarpaulin. All plastic componentry are UV treated to last longer in the sun| and nuts and bolts are Stainless Steel for longer life. Spigot pins are made from Hi-Tensile 8mm stainless for superior strength. The poles are ideal for the weight conscious camper.