The ADS 0811AA split coupling is used for connecting two 8" (diameter) corrugated drain pipes. It is made of High-density Polyethylene (HDPE), a type of plastic known for its strength, malleability, and for being light-weight and FDA-approved. To make a strong joint, you can snap this coupling over the ends of the corrugated pipes. This split coupling is a genuine part manufactured by (ADS) Advanced Drainage Systems.