No.4 is the mill/industry grit designation for this finish — the name used in ASTM/US material specs and mill certificates. Satin finish is the same surface described by its visual result, and is the term more commonly used in architectural, retail, and consumer product contexts across the US and Europe. 

Sanmei Metal supplies this satin No.4 finish on 304, 316, and 430 stainless steel coil and sheet, ready to ship with no MOQ.

Satin No.4 is common on flatware, cutlery, and cookware like double-walled cafetieres — the directional grain masks fine scratching from daily washing, keeping the surface looking consistent over years of use.

The brushed texture conceals water spots and light scratching better than a mirror or 2B surface, which is why it's a standard choice for kitchen sinks and similar fixtures.

Moderate reflectivity limits glare in indoor spaces, and the brushed surface holds up under constant hand contact — a common reason it's used for handrails and similar high-touch architectural elements.

The matte-satin sheen gives a clean, understated look on visible surfaces, without showing handling marks from daily use.