Cerro 1/2"x2' Type M Residential Hard Copper Tube. Made from durable type M copper, this pipe is maintenance-free, corrosion-resistant, and noncombustible. Ideal for general plumbing and heating purposes, it withstands temperatures up to 400°F and pressures up to 850 psi. ASTM compliant and NSF certified, it comes with a 1-year warranty.