Head fitting: Mitchell top plate. Technical Specifications: Materials and Finish Castings are LM25 anodised, stove enameled black texture. Tubes are 1” dia x 16swg HE30TF alloy, polished and anodized, with nylon wipers and nylon locking pads. Stainless Steel spikes to feet, with rubber covers. Locking levers are anodized and stove enamelled black texture. All steel parts are hardened where necessary, and chrome plated. Spreader: An infinitely adjustable spreader with a strong elastic clip-down device, which is secured in seconds. Made from high tensile anodized aluminium with large diameter locking hand-wheels to adjust length of spread; steel parts hardened and heavily chromium plated. Dimensions (center to foot) minimum 1’5” (43cm), maximum 2’1” (64cm). Weight 4lb 7oz (2kg).