Stair tread 1. size 7"x16" 7"x24" 2.finish HTG, galvanized, painted 3 different decorative pattern Stair tread1.size 7"x16" 7"x24"2.finish hot dip, galvanized, painted3.material, iron, stainless steel, aluminumalso can produce according to your request.The special surface holes can provent sliding, it's safety walking stair tread stair tread