... mechanism 4) 4D non-button adjustment armrest • Product Features ModelEC02H-MG MaterialMeshFrame colorPolishing aluminum base, polishing mechanism, grey frame color ... (95mm), forward adjust depth (50mm).Armrest4D non-button adjustment armrest [height (95mm), angle, width, forward and backward].Caster ... Mesh back, leather seat)↓ Modern design ergonomic mesh office chair, hot selling product [EC02H-MG]