Double-braced tripod base ;Fulcrum shaft height adjustment;With Memory Lock for height adjustment ;For thrones of the Gibraltar 9608 model series;Also suitable for other seats with 7/8" (2.22 cm) tube mount;Double-braced tripod base;Fulcrum shaft height adjustment;With Memory Lock for height adjustment;'Quick Lock' system;'Super Foot' rubber feet;For stools in the Gibraltar 9808 model series;Also suitable for other seats with 7/8" (2.22 cm) tube mount;Height adjustable ca. 41 cm - 65 cm;