Give a 1.5" OD railing run a finished, decorative ending instead of an open tube. The Ball Finial for 1.5-inch OD Tubing (00-604/1H) presses into the tube end on a press-fit stem and sits a full round ball above the rail — the ornamental cap you want at the head of a staircase, the end of a balcony rail, or on a period brass railing. Pick the finish that suits the space: polished brass for a warm look, 304 polished or satin stainless for a bright or low-glare interior rail, or 316 polished or satin stainless for pool-side and coastal runs. It fits.050" or.060" wall tubing, so one cap works across standard and heavier-wall rail. Purely cosmetic, it caps the tube end and matches your fittings.