Zamp Plate w Nut Rectangle 80.5 X 50.8 for Race Seat Harness. Rectangle Plate w/ Nut 80.5mm x 50.8mm. Fits Seat Harness: 6-point 3"/2" Pull-Down(Out) FIA Harness (HARN03F003), 6-point 3"/2" Pull-Up(In) FIA Harness (HARN03F005), 6-point 2" Pull-Down(Out) FIA Harness (HARN04F003)