Cannot recommend this company
I purchased a Tempest cylinder and
1. The overall diameter of the cylinder was significantly greater than shown in the spec-sheet. I purchased this particular cylinder as it had to go through a narrow opening and 10mm oversize results in additional work
2. The packaging was not specific to the cylinder and allowed the cylinder to rotate while in transit and for a valve to puncture and protrude from the packaging
3. There were no temporary dust caps on the tank openings
4. One of the immersion-heater covers was missing its retaining nut and had fallen off
5. The cylinder was poorly presented - Oily finger prints and scuff marks on the cylinder
Telford Technical Support were responsive and helpful but, overall, I believe that the list of issues I encountered indicates a company that has low standards for quality.