All our aluminium spreader 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 ttings are UV treated to last longer in the sun, nuts and bolts are yellow zinc plated for longer life. Spigot pins are made from 8mm Hi-Tensile Steel rod for superior strength which is also yellow zinc plated. The poles are ideal for the weight conscious camper.