1 x M12-1.5 male to 1/8" NPT (coolant temperature sensor). 1 x M12-1.5 male to 3/8" NPT (coolant temperature sensor). 1 x Extended length M12-1.5 male to 3/8" NPT (coolant temperature sensor). 1 x M12-1.5 male to 1/2" NPT (coolant temperature sensor).