A 660 lb rating is what makes these stairs suitable for a hot tub or an RV door rather than a light indoor stool. Three treads rise 6.5 inches apart, widening from 9 inches to 13.5 inches at the top platform, so the last step gives room to stand and turn. The handrail mounts on either the left or right side, chosen during assembly to suit the doorway or spa edge. Textured anti-slip patterning is embedded in each platform for wet feet. Metal construction and reinforced supports carry the load, and the 32 lb weight keeps the frame planted on a deck. Overall the stairs measure 31 by 27 by 51 inches including the rail.