Assenmacher Specialty Tools FZ 41 Cooling System Adapter Assenmacher FZ 41 adapter features male 63 x 3mm buttress threads Applicable: [1999-2016] VW and Audi Models (*Except Older Audi A8 and S8) For pressurizing cooling system Product Dimensions 3.1 x 2.6 x 2.4 inches Item model number FZ 41