All our aluminium lever clamp 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. 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.