2 x 3/8" male BSP and 1 x 1/4" male BSP thread fittings. In some models the 1/4" fitting is capped off. In the one group models a 1/4" female x 1/8" male reducer fitting is used to connect to the old black 1/8" hose, # 4615456 (old #15456).
This version comes with the externally exposed water cooling tubing, as opposed to the other version out there with internal cooling tubes.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.