Our replacement vertical ladder treads are used on pool ladders and diving towers. Manufacturer standard measurement is center-to-center dimension (C to C) of your rails. We have also provided the actual measurements of the tread in the diagram below to help ensure you get the correct tread.
Paragon steps are molded from UV inhibited ABS. For 1.90Ó O.D. rails. These steps include hardware and come with installation instructions.