Switches, pull-knobs, etc, made of rigid material, which, measured in accordance with the method described in Annex V from 3 72 mm to 9 75 mm from the panel, shall have a cross-sectional area of not less than 2 cm2, measured 2.5 mm from the point projecting furthest, and shall have rounded edges with a radius of curvature of not less than 2 75 mm.