The DTG-PAVERS or LUMBER JOIST Adjustable Pedestal Support (pack of 8) comes with 8X Thickness Spacer Tabs, 8X Shims and 8X Lumber Adaptors, which are interchangeable. The PAVERS can be used to allow for space between marble, pavers or cement tiles. It is adjustable from (60mm-80mm) 2.36-3.15 when using the Spacer Tab. The DTG-Adjustable Pedestal Support with Lumber Adaptor is used to connect standard wood profile or aluminum sub frame to the DTG-Adjustable Pedestal. It is adjustable from (70mm-90mm) 2.75-3.54 in. when using the Lumber Adaptor. You can install a regular 4 in. x 4 in., 2-2 in. x 4 in. or 2 in. x 6 in. beam inside the space of the Lumber Adaptor. Remember that the heights shown above do not include the thickness of the tiles, paving slabs, or lumber you choose to use.