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Details O2 clean 40cf Aluminium Sidemount Cylinder (5.7L) is rated to a working pressure of 207 bar and comes with a Left or Right hand expandable G5/8 valve. This 40cf Aluminium Sidemount Cylinder is suitable for sidemount divers looking for cylinders smaller than the popular 7L or 11.1L (80cf) ones, or for those wanting to carry stage cylinders on both sides. Cylinder specification Size: 40cf (5.7L) Manufacturer: MES Working pressure: 207 bar O2 clean Diameter: 133mm Length: 628mm Empty weight: 6.9kg Valve specification Expandable with blanking plug Available as left or right hand valve O2 clean Item not available for outside mainland UK. If ordering from outside of UK mainland please check with us before placing your order to ensure availability for your location, shipping options and additional shipping charges. You can do so by using our Online Contact Form .