Senza High Back Operators ChairSenza High Back Operators Chair Comfort, reliability and affordability are the key attributes of the Senza operators chair with its curvaceous profile and vast array of options that deliver style as well as substance. Equipped with ergonomic features, a high back, extra high back and mesh back options, this operators chair easily provides the comfort needed for a long day at work. Asynchro mechanism provides free floating back action, lockable seat