supply of ultima mid back chairultima mid back chair,ultima mid back chair -the seat and back are made up of 1.2 cm. thick hot-pressed plywood, upholstered with fabric upholstery covers and moulded polyurethane foam. the back foam is designed with contoured lumbar support for extra comfort. the seat has extra thick foam on front edge to give comfort to popliteal area. dimension back size - 47.5 cm. (w) x 58.0cm. (h) & seat size 47.0 cm. (w) x 48.0 cm. (d). polyurethane foam: the polyurethane foam is moulded with density 45+/-2 kg/m3 and hardness 20+/-2 at 25% compression. 3) armrests: the one-piece armrests are injection moulded from black co-polymer p olypropylene. 4) center tilt synchro mechanism. pneumatic height adjustment-the pneumatic hei ght adjustment has an adjustment stroke of 12.0 cm. telescopic bellow assembly: the bellow is 3 piec e telescopic type and injection moulded in black polypropylene. pedestal assembly-the pedestal is injuct ion moulded in black 30% glass-filled nylon and fitted with 5 nos twin wheel castors. the pedestal is 66.0 c m pitchcounter dia (75.0 cm with castor). twin wheel castor the twin wheel castors are injuction moulded i n black nylon [ warranty period: 30 months after the date of delivery ] ] , ultima mid back chair -the seat and back are made up of 1.2 cm. thick hot-pressed plywood, upholstered with fabric upholstery covers and moulded polyurethane foam. the back foam is designed with contoured lumbar support for extra comfort. the seat has extra thick foam on front edge to give comfort to popliteal area. dimension back size - 47.5 cm. (w) x 58.0cm. (h) & seat size 47.0 cm. (w) x 48.0 cm. (d). polyurethane foam: the polyurethane foam is moulded with density 45+/-2 kg/m3 and hardness 20+/-2 at 25% compression. 3) armrests: the one-piece armrests are injection moulded from black co-polymer p olypropylene. 4) center tilt synchro mechanism. pneumatic height adjustment-the pneumatic hei ght adjustment has an adjustment stroke of 12