Originally Posted by Eeyore
I haven't weighed any of mine but do I assume the 33g is the total weight I should expect (including the weight of the metal cylinder itself? (sorry if that's a stupid question!)
Not a stupid question but indeed a very important question
The 33g relates to the min weight of CO2 gas in the cylinder and is "normally" the weight associated with 150N LJs.
However there will be another "nominal" weight stamped on your cylinder which is the combined weight of the "liquid" gas and the metal cylinder ie I have one here that states the nominal weight as 139.0g.
I hope this is makes sense