An SBR rubber unit that provides for drainage, air circulation and precise paver alignment (patent pending). The SBR rubber is recyclable and manufactured exclusively for the support of the Terra Pavers on the Terra Stand installed over a waterproof membrane. It has a shore hardness 70 (ASTM D 2240-91) allowing for resiliency without sound transmission. Available in three sizes to accommodate all pavers sizes. Terra-Tab spacing tabs allow for perfect 3/16? (4.76 mm) joints to provide for expansion, air circulation, drainage, and precise alignment. Optional 1/8? (3.18 mm) tabs area available for the #5A and #6A tabs. Average installations call for one Terra-Tab per paver on a standard square or rectangular deck. Decks of other designs and/or containing columns will require more Terra-Tabs for use with the cut pavers.