Pipe Connector 1.Certification:ISO9001,ISO14001,TS16949 and NSF 2.Free samples ... to, but always larger than, the outside diameter of the material to be clamped. That outside diameter should be determined with ... -.445100010,000S511810.1-11.8.398-.465100010,000 ISO9001 Pipe Connector(7.0-8.7mm Range)