Pedestal Components: The “press fit” connection of the top and bottom cap to the PVC pipe requires no gluing or other attachments. Both the wedge top shims and round bottom shims can be used for “fine tuning” proper height if required. All top shims and bottom shims lock into place, and all six pieces (if used) interlock, allowing no paver movement and a level surface. The round bottom shims have a unique “V” groove, which allows them to be scored & broken in half with a utility knife and stacked on the bottom for those areas that are sloped more than 2%. They lock to each other and to the bottom cap to impede movement of the pedestal. The subsequent weight of the paver will keep the system in place. The caps can be easily removed during installation if desired.