Mission Clay Products 8" X 5' (or 6') Clay PipeASTM C 700 and ASTM C 425 which supersede Federal specifications SS-P-361e and SS-P-359bSSPWC, Standard Specifications for Public Works Construction, also known as "Greenbook"International Association of Plumbing and Mechanical OfficialsSold in 5 or 6 Foot LengthsPriced per piece