If you concur, we may use your own information from any of those Amazon solutions to personalize the advertisements we explain to you on other expert services. ISO 6708 defines the nominal measurement - DN - being an alphanumeric designation of dimension for reference uses. For vendor’s return plan click https://www.ravensbergersolar.de/zubehoer/zuleitungen-wellrohr/edelstahlwellrohr-dn16-als-einzelrohr_471_2603/