Waterfront rails, pier runs, and exterior pipe railings close gently with this cap: it seats inside a 1.67" OD Schedule 40 pipe end (1.5" nominal pipe) and presents a soft dome face — a warmer termination than a flat cap. Offered in 316 polished or satin stainless for .080" Schedule 40 wall pipe, it holds up to salt air, chlorine, and weather; polished reads bright, satin reads softer. The cap is purely cosmetic, closing the pipe end with a rounded face and no structural role, and matches the rest of a 316 pipe-handrail run.