1.Manufacturerl for air dryer,air dryer filter 2.STANDARD:ISO9001-2008 3.WARRANTY:ONE YEAR. 4.Reasonable price ,good quality. WABCO NUMBER 432 420 000 0HEAT:24VCONN:M27*1PORTS:1+21=M22,22+4=M12WABCO NUMBER :432 420 003 0HEAT :12VCONN:M27*1PORTS:1+21=M22,22+4=M12 WABCO AIR DRYER FILTER FOR TRUCK