818A-11P9C1C3 Arms: Cantilever, Seat Material: Matrex Features: -Big and tall executive high back chair.-Breathable Matrex back and Matrex seat with adjustable lumbar support.-Cantilever Arms.-One touch pneumatic seat height adjustment.-Deluxe 2-to-1 syncro tilt control with 3-position llock, anti-kickback, seat Slider and tilt Control.-Rated for up to 300 lbs..-Heavy duty angled polished aluminun base with oversized dual wheel carpet caster. Specifications: -Seat Size: 20W x 19D x 3T.-Back Size: 19.75W x 23H. Collection: -SPACE Collection. Warranty: -Lifetime Manufacturer"s Warranty.