RH Activ 220 ESD Cleanroom has a large backrest and medium seat. Base in black lacquered aluminium and free wheeling ESD castors in metal. RH Activ 220 ESD Cleanroom is certified and approved for work environments in cleanroom environment and designed to deflect static electricity, release a minimum of particles and easy to clean. RH Activ 220 ESD Cleanroom is upholstered in black antistatic vinyl.