bids are invited for hb revolving chair01 - providing and supply high back rev. chair upholstered with leatheretteseat made up of 12 mm +/- 1 mm thick hot pressed mr grad plywood and back in two pieces - 12 mm rear back and 6 mm inner back. moulded polyurethane foam used in making seat with moulded density 45+/- 2 kg/m ³.back is made out of 32 density block foam covered with 14 mm thick 32 density foam sheet (block foam).spine bracket made of m.s plate 8 mm thickness connecting back with mechanism. armrest top is soft touch polyurethane mouldedof 250 to 300 density insert in chrome finish pipe having unique bird beakshape. the mechanism of the chair have following features: 360° revolving type3.5mm thkcrcaseat plate with 4mm thk crca channel platesynchro mechanism, tilt tension adjustable, single position locking , plastic component inside the mechanism of grade - mi 3530 and epoxy powder coated 70 microns with tested 1.2 lacs cycles as per bifma standard.the chair provided with pneumatic height adjustment which have have stroke of 100 mm +/- 5 mm.the five legbase is made up of 38mm dia x 1.2mm thick tubular with 3.15 mmthick centre hub crc fabricated chrome finish. it have be fitted with 50 mmdia twin wheel castor . the size of the base have be - 660 +/- 1 mm pitch-centre-diameter. load test as per bifma compliance.the twin wheel castors made of nylon injection moulded in black colour.overall dimensions of chair have be, width of chair - 640 mm, depth ofchair640 mm as measured from base below. height of back from ground - min 1175 to max 1275 mm. seat height -min 480 mm to max 580 mm. dimensions tolerance / variations have be within +/- 10 mm. , mb revolving chair02 - providing and supply med. back rev. chair upholstered with leatheretteseat made up of 12 mm +/- 1 mm thick hot pressed mr grad plywood and back in two pieces - 12 mm rear back and 6 mm inner back. moulded polyurethane foam used in making seat with moulded density 45+/- 2 kg/m ³.back is made out of 3