The Grooved 1 Square profile is super modern and simple with a completely square top and a small thin groove running horizontally just below. It's manufactured using premium moisture resistant MDF meaning imperfections such and knots, cracks and splintering are non-existent. The picture represents an architrave that is 70mm wide and 18mm thick. Note that the groove is approximately 6mm x 6mm and starts 20mm from the top (the groove size and positioning does not change regardless of the width you choose). This product is 70mm in width, 18mm in thickness and 2440mm in length. It has a primed (white) finish.