CNC aluminum 36mm for Nissan Radiator Hose KA, SR, RB OK! ~Water temp gauge adaptor installs inline into upper radiator hose. ~ With 1/8npt fitting ~ Possible to retap the adapter to fit larger sensors/hose fittings. ~ Lets you access the water line without major modification. ~ 2 hose clamps included ~ One of these is required for a breather tank install, Two are required if you dont want to drill and tap the OEM filler neck on the upper radiator hose.