DuoTrack featuring a double grove for two sizes of PEX tubingMrPEX Systems has introduced a new style of extruded aluminum heat transfer plate for 3/8-in. or ½-in. PEX tubing in the same plate. DuoTrack is 48-in. long x 3.75-in. wide, with pre-punched holes featuring a double grove for two sizes of PEX tubing. This reduces inventory, space and cost.