www.pmmag.com/articles/89076-ideal-no-hub-couplings
Ideal No-Hub Couplings
December 1, 2004

Ideal No-Hub couplings have a patented bi-directional shield design for reliable sealing, as well as floating eyelets to help eliminate leak paths. They use the highest-quality tested and certified materials. All metal components are 300 series stainless steel.
Circle 2