bids are invited for drive wheel - iron die cast with anti rust zinc. 1000kg per wheel driving wheel will be a comprise of a central hub. pu moulded with steel for better str , locking knob on each unit - each drive type units shall have locking knob near the drive wheel for manual locking of individual units , ventilated seats - both front and back panels designed with ventilated for better air circulations , racks - made of 0.7mm thick crca steel confirming ti is 513 gr.d or dd. mac load bearing capacity is 100 kgs , superstructure - quick level adjustable as no bolted shelves. wider shelves for more space within level and consist of storage units 2180mmh x 457 mmd x 900mmh of crca steel confirming ti is 513 gr.d , undercarriages - base frame is fabricated from hrc material confirming to is10748 or is1079 with thickness of 2.5 mm with height of 100 mm. study modular design, flexible and anti tipping mechanism to stability movement , rails - it consists of c section 2 mm thick hr sheeet and square 25.4 mm x 2 mm thick of erw tube connected by screw/ channels length i.e,. 800mm, 1600mm and 2400mm , wheels assembly - plain wheel with self aligning plummer block assembly, smooth and noisy free operations , drive units - effort reducing design mechanism and single handle drive for easy and ergonomic operation and safety knob below handle ensures safe aisle for human access total quantity : 66