Kiln Fired for permanence, will never fade or peel Made from frost-proof porcelain tile Made in the USA Each piece measures 4" in diameter Step markers serve a dual role in any pool. First and foremost is safety. Without step markers the edges of steps, Baja shelves, and tanning ledges are difficult to identify beneath the water’s surface. This can ultimately create a fall or drowning hazard. The second role is more cosmetic. Step markers add a pop of personality to your pool. By choosing dolphins, turtles, starfish, or any other variety of our markers you can add a bit of character while making your pool safer for all. Our step markers are made of high quality porcelain that is glazed and kiln fired up to 1800 degrees to preserve the intense color and ensure that our step markers will never fade or peel.