Boss Office Products B6888-BK Multi-Function Mesh Chair in Black Contemporary ergonomic mesh back, designed to provide exceptional back support and to prevent body heat and moisture build up Chrome accented multi-directional, adjustable arm rests; 2 to 1 synchro-tilt mechanism with a seat slider Seat slider allows the user to easily adjust the seat depth; Breathable mesh seat Adjustable tilt tension control 27" chrome base; Hooded double wheel casters