bargain carb cleaner multipack

[johnnymarr]

Just bought on e-bay, cheapest ive come across so mebbe worth posting :

 www.ebay.co.uk/itm/STP-CARB-SPRAY-CLEANER-500ML-AEROSOL-FOR-CARBURETTOR-4pk-/151896019928?hash=item235db553

Should last a while , take it no real shelf life ?