OSC Premium New Automotive Heater Cores are designed to Original Equipment's form and function. OSC's heater cores are technically advanced and made from premium grade Aluminum. The tubes are cadmium plated inside and out to prevent premature failure. Each heater core is individually pressure tested. All necessary foam and accessories are included in each unit. NOTE: All OSC Heater Cores are made from Aluminum. They are a direct replacement for a copper designed Heater Core.