The RS Plus market umbrella is manufactured using tensile aluminium as the core of the roof frame and reinforced with stainless steel. The mast is 35mm dia 2mm wall stainless steel. This gives superior rigidity and strength. As with the Lambert there are 8 tensioned ribs. The large models in the range are fitted as standard with a telescopic facility to enable the open roof height to be adjusted. The canopy is either polyester or more robust acrylic with a scalloped valance (straight edge as option). Hooking points for rain gutters and side sheets are fitted every half metre inside the valance. A clever tension bar is fitted as standard to ensure tautness of the canopy.