Looks like its co2 which works but isn't great for a nice weld.
Also remember each time they send it will be £20.00 cause you have to send back the empty (You may even have to pay a deposit on two cylinders unless you send yours back first for a refill)
Unless they are close enough to deliver or for you to collect it might turn out to be an expensive old job!! Worth speaking with them to get a firm price or see if you can purchase argon mix instead.
I can't see how they can post the things anyway local delivery sure, but sending them out by Carrier surely contravenes all the Health & Safety rules?
weldequip
CO2 is fine for the sort of welding I do.
I'll give them a ring sometime and see what the crack is. Maybe they pick up the old bottle when the new one is delivered. It does seem too good to be true though.
They only deliver in the NW. Worth considering if you live in their area though. £20 initially for a bottle and then £7 for a refill seems like a bargain.