NDS 1230 12" Black Square Low-Profile Adapter Drain, Connects to 3" to 8" Drain Pipes manages heavy flows from lawns, landscaped areas, under downspouts, patios, and walkways. The 12 in. Square Low-Profile Adapter works in spaces where a traditional catch basin won’t fit. It connects to a drain pipe sizes from 3 in. to 8 in. using designated outlet adapter (sold separately). Made of high-impact polystyrene (HIPS) treated with UV inhibitors. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.