Turn your electric fan into a thermostat controlled fan! PROFORM's premium adjustable fan controller make this easy! The thread-in probe can be installed directly into the water jacket of the intake manifold, engine block, or cylinder head. Fan activation is adjustable between 150 and 240 degrees F. This fan controller is recommended for race and street applications.Proform recommended for race and street applications 69598Specifications: Thread Size 3/8 inch NPT Feature/Benefit This stainless steel tool makes installing pistons easy. Color Black Tool Type Piston Installation Tools Category Elec. Fan Controller Finish Black Description_ABR Fan Control Description_SHO Elec. Fan Controller Description_INV Elec. Fan Controller Description_INV Adj. Thread-in Description_DEF Engine Cooling Fan Controller Description_ASC Electric Fan Controller Description_ASC Adjustable 150-240 degree range Description_ASC Thread-in probe sensor Description_LAB Electric Fan Controller Description_LAB Adjustable 150-240 degree range Description_LAB Thread-in probe sensor Description_DES Electric Fan Controller Description_DES Adjustable 150-240 degree range Description_DES Thread-in probe sensor Description_EXT Electric Fan Controller Description_EXT Adjustable 150-240 degree range Description_EXT Thread-in probe sensor Description_EXT recommended for race and street applications Description_MKT Turn your electric fan into a thermostat controlled fan! PROFORM's premium adjustable fan controller make this easy! The thread-in probe can be installed directly into the water jacket of the intake manifold, engine block, or cylinder head. Fan activation is adjustable between 150 and 240 degrees F. This fan controller is recommended for race and street applications.