Officina RC OFC-003 1-10 Adaptor 7mm for Forza Tester $14.95 / Tax included. Default Title Default Title (Out of stock) Out of stock Your Email Send This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. 7mm adaptor for the Officina RC Forza Tester. Allows you to test take diff readings by connecting the Forza Tester straight to the wheel nut.