supply of executive chairs (high back)executive chairs (high back),executive chairs (high back) general requirement type of chair high back understructure tilt mechanism synchronic tilt mechanism locking mechanism upright locking seat dep th adjustment adjustable revolving mechanism designed with 360 degree-revolving type height adjustme nts pneumatic/hydraulic pedestal base glass filled nylon type of chair base with castor twin wheel castor material nylon number of twin wheel castor / studs (nos) 5 minimum diameter of twin wheel castor (mm) 5 0 mm minimum thickness (in mm) of ms plate joining the backrest with seat of the chair 6 millimeter seat seat base material hot pressed plywood seat material moulded pu density of pu used in seat (kg per cubic meter) >4040400400400400450 => limited