A pine wooden frame with semicircle shaped top edge, with transparent or brown lacquer finish.
Links[1] https://www.dubielvitrum.pl/sites/default/files/styles/duze_800/public/rama_drew_ab_0063.jpg?itok=vWfVr4uZ [2] https://www.dubielvitrum.pl/sites/default/files/styles/duze_800/public/rama_drew_aj_0065.jpg?itok=H0KaFOUm