For cast iron, plastic, copper, steel or to cast iron, plastic, copper, steel or lead. Made of elastomeric PVC which is resistant to caustic chemicals and ozone. High tear and shear strength. Includes both an ultraviolet sunscreen and a fungicide preventative. Produces a positive seal. Conforms to applicable parts of ASTM #C443, C425, C564, and D1869. Includes two stainless steel clamps.