There are 14 stair treads, riser and tread, first-grade Turkish marble. Measurements: 1.00 meter for the tread and 15 cm for the riser. 14 pieces for the riser. 14 pieces for the tread. Excellent quality, same as in the pictures. It is new. The reason for selling is the tiler's mistake in measurements. We wanted 1.2 meters, and he got us 1 meter. The market price per meter is 85. I am selling it for 45 riyals per meter, half price.