Quality Seating at its finest. KAB / Seating with Heavy Duty Backrest•Heavy duty mechanical suspension (4 in. stroke) with double shock dampers Pt. #KAB 525HB-KS, Mechanical Suspension•2.25 in. seat cushion vertical adjustment range, and seat cushion front & back will tilt independently in the same range •Heavy duty reinforced seatback frame with rotary recliner •Pneumatic lumbar support •High profile backrest with full range recline •Double locking sliderails - located below suspension •Seat belt to anchorage ISO 6683 & SAE J386 (15kN) •Includes headrest, armrests, double dampers and steel cable tethers