Abstract: Two separate tubular elbows are each mountable on upright inward upright surfaces below an arch of an arched door or arched window, with a free open-end of each tubular elbow directed upwardly toward the arch. One end of a plastic tube of polyvinyl chloride is detachably mounted rigidly within the open-end of of one of the tubular elbows, and an opposite end of the plastic tube is detachably mounted rigidly within the open-end of the other remaining one of the two separate tubular elbows. Between the spaced-apart mounted ends of the plastic tube, an intermediate portion thereof is bent into a bow-shape corresponding the approximate shape of a lower surface of the upwardly located arched door frame or window frame.