The bases for all our chairs are mounted onto hydraulic pistons for the added shock absorption which leads to the level of comfort you’ll expect from all our chairs.

This class of piston is compatible with all our office chair mechanisms.

Short Piston - Used for XL chairs such as the ZEPHYR Series and older models like the PRO XL, ELITE and SPORT.

Regular Piston - Used for our PRO Series Gen 2.0 and suitable for our Ergonomic office chairs.