The Jirra Pro high back task chair has moulded foam seat with mesh back, underseat synchro tension adjustment, sliding seat depth, adjustable lumbar and the choice of arms | Part of the extended Jirra family the Jirra Pro is a great entry level synchro chair | 5 fin black nylon base | Adjustable synchro mechanism with tilt lock | Adjustable padded lumbar support | Thick comfortable moulded seat | Sliding seat depth adjustment | Black fabric seat | Black mesh back | 3D adjustable arms (when fitted) | 60mm castors