A good office that will always help you solve the problem with the gases you need, helped out with the exchange of cylinders, as well as refilling a small cylinder with carbon dioxide. You can always negotiate good terms.
The prices on the website are the same, but on the phone they are different. He won't get through after 17:00. Although they work until 18. The cost of delivery is somehow strangely announced. On the website and in advertising posts on forums, someone else's goods and other people's premises are presented under the guise of their own. Which is misleading.
I have been working with this organization for several months now. All cylinders are full, certified and do not poison during the exchange. Develop and so on!