ECO70BM operator chairs are designed for commercial use. Comes with standard size back, is injection moulded and back tilt.
Their features include :
Back Height - 430 mm
Back Width - 440 mm
Seat Depth - 450 mm
Seat Width - 500 mm
Seat Height - 470 mm to 600 mm
Summary - Chair clips together out of the box, no tools are required.
Recommendations - Very easy to do yourself, if you have the time.