Vertical blind with micro-slat stainless steel curtain and guide track, stable in winds of up to 25m/s, integrated into building alcove. Curtain runs at the side in single 30 x 30 mm / double 80 x 34 mm extruded aluminium guide track(s), with integrated plastic guides on both sides. Concealed fixing of guide tracks to buildings cover strips. This is done by screwing clamps to the local M8 threaded bolts, onto which the guide track gets clipped. Bottom bar in rounded shape, made of extruded aluminium, anodised in stainless steel colour, 34 x 27 mm, with integrated slot for fixing the curtain and sliding polyamide guides on both sides.