Pipe material can refer to a variety of materials, including LEAD, COB, BRIER, corn COB, BRIAR, PVC, CLAY, TILE, WOOD, and MEERSCHAUM. LEAD is a soft, malleable metal that has been used for centuries in the construction of pipes. COB is a type of CLAY-based material that is often used in the construction of pipes. BRIER is a type of WOOD that is commonly used for making pipes. Corn COB is a type of plant material that is sometimes used for making pipes. BRIAR is a type of WOOD that is often used for making pipes. PVC is a type of plastic that is commonly used for making pipes. CLAY is a type of earth material that is often used for making pipes. TILE is a type of ceramic material that is sometimes used for making pipes. WOOD is a type of plant material that is often used for making pipes. MEERSCHAUM is a type of mineral that is sometimes used for making pipes.