A 1.5-inch OD post is the everyday railing size, and the 816/1H is the glass grip that fits it without committing to one glass thickness. Its curved back seats on the round tube, and the single-piece radius clamp takes either 1/4 or 3/8-inch tempered glass, so one part number covers a range of panels on a stair guard, a mezzanine rail, or a partition run. The rounded body keeps the hardware soft against the glass. It is made in 304-grade stainless steel, polished for a bright line or satin for a low-glare finish, both for interior use. The same range-fit grip comes in 1-inch and 2-inch post sizes and in a flat-surface version, so a run that mixes posts and walls can use matching hardware throughout. Ships from US inventory.