Premium high-temperature coolant, water and air applications. Suitable for OAT (organic additive technology) engine fluids. Can be used with PowerGrip® Shrink Band Clamps, made from a heat-sensitive thermoplastic with a memory to prevent over- or under-tightening. Also available as customer-made curved hose to SAE 20R4 EC D-1 to fit specific applications and meeting customer specifications. Curved hose recommended for upper, lower, by-pass, heater and other coolant applications. Can be installed without buckling, bending out of shape or straining at the connections. Standards: 4230SB - normal duty heater hose to SAE 20R3 EC Class D-1 ; 4175SC - heavy duty radiator hose to SAE 20R1 EC Class D-1, standard wall.