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My guess is around 25 lbs. You raise/lower the shelves using a screw knob on each side - loosen, adjust, tighten.
Sorry, there was a problem. Please try again later.To lift/lower the trays, there are 2 screw-knobs on both sides - you have to loosen then, then change the tray height and while holding it there, tighten the 2 screw knobs. Weight - not sure, but 2 normal adults can easily lift it if necessary - though the wheels do work - though not exactly very smooth.
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