just looked at ours it has printed on front .....GB net 2.72kg i dont know if thats the weight of gas in bottle or overall and as im a fatty i wont have scales in house to check for you
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never argue with an idiot, they will bring you down to their level and beat you on experience
The 2.72 kg is the gas weight - I'm don't know the 'official' empty cylinder weight, but I think it's a little over 3.5 kg since my scales weigh a full cylinder at around 6.5 kg.
The empty cylinders vary a lot. If you want estimate by weight you need to weigh each full cylinder as you receive it and work by subtraction.
Instead you can tell how much gas there is by shaking the cylinder. You can feel the liquid butane moving around inside. If it is full there is not much movement. With a bit of practice you can tell if you have enough for your next trip which is all that matters.
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