https://www.ultrahighvacuum.com/shop/iso250r63-iso250-to-iso63-tubulated-reducing-connector-30465
ISO250 to ISO63 Tubulated Reducing Connector | ultrahighvacuum
ISO Straight Connectors are used to extend ports and pipework to a required length. Manufactured from: 304 Stainless Steel. Helium leak tested to 10-8 mbar....
reducing connector