Wanted: Office desk chair (without arms please)

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I have a chair (an ikea model something like the one below) but it even when adjusted it's very low and is causing me some back discomfort while sitting for longer periods while trying to get essays written. If someone has something similar I'd be very grateful. nb i added the plea for 'without arms' as it will double-up as a chair to play guitar in sometimes thanks http://www.ikea.com/gb/en/catalog/products/00283891/#/80290468

Categorised as: Things Wanted