WLD-TEC 6.000.850 Gas-Safety Adapter with Integrated Pressure Regulator, Gas Leak Protection, 0.5 m DVGW-Tubing and Stainless Steel Stand for Gas Cartridges CV 470 / 270: Science Lab Gas Detection Regulators: Amazon.com: Industrial
NeoLab 7-8226 Safety Adapter with Pressure Regulator for Cartridges, CV470 + CV270 : Amazon.nl