150 mm Oversize Shower Arm Cover Plate
A 150 mm escutcheon plate that slides over a standard 1/2 in IPS shower arm (21.3 mm OD; 22.5 mm bore) and covers a rough wall hole up to about 140 mm across. Most "oversized" plates in stores stop around 100 mm. It prints face-down so the visible face comes out smooth. The 10 mm deep ribbed back reaches over uneven tile, an M4 set screw in the collar grips the arm, and a weep notch at the bottom lets trapped water drain out.
bathroom escutcheon shower-arm cover-plate