Alpha 60H Executive Mesh Seat Office Chair Color: Black Fully adjustable split-fit dual backrests to fit perfectly for most body size Seat slider, adjustable headrest, seat height adjustable for individual fit Synchronized tilting system Fully adjustable armrest, easily adjustable slip-resistant armrests Cal 117 Compliant & Meets or exceeds all U.S. home office furniture industry standards (ANSI/BIFMA)