This kit contains 4 replacement leg extensions for our Premium American-Made portable tables. Includes: Athena, Omni, Feldenkrais and Hawaiian. If your table is standard height range choose the 25"-35" set, If your table was purchased as a low height range, choose the 18" - 26" set. Sorry, they are not interchangeable. Each height range is engineered to work only with the extensions of it's original height range.