4 inch x 8', black, expandable perforated flex drain, expands from 2' to 8', can be used in most draige applications, soil tight fittings are built into the pipe & the pipe holds its shape after it is bent, therefore no other connectors are needed, simply dig your trench, lay your flex drain pipe & cover it up, meets the corrugated polyethylene pipe associations test for crush resistance. This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in chi.