+ve = positively buoyant
Not sure what naming convention Faber use, but if you check divefaber.com, you'll see that there are various weights for all the 232 bar cylinders. My 7s are 8.2kg each - in the sea they're 1.8kg -ve full, and 0.1kg +ve empty.
Faber's lightest 7L on their website is 7.6kg, they'd be 1.3kg -ve when full, and 0.6kg +ve empty.
I find it interesting to note that Faber 300 bar 7s can weigh as little as 8.2kg - maybe I should start overfilling my twinset to a greater extreme?
