HFS (R) Tri-Clamp Condenser with (2)1/4 FNPT Ports SS304 Heat Exchanger (4" X 12") With 9 pipe HFS In-line Condensing Spool allow you to add to remove heat while your product flows through the spool. Interior piping is completely segregated from the coolant so there is no chance of contamination. Coolant is pumped through 2 1/4" FNTP ports while product flows through the main spool. Fits 4" Tri-Clamp Size 12" In Length