Ford 9" Pinion Seal Viton Rubber

this Aeroflow performance viton 9" ford pinion seal are good to over 200 degree celsius. The stock rubber seal starts to deteriorate at about 120 degree celsius making this a great upgrade when building a diff. Outside diameter is 3" ( 76. 20mm ). Inside diameter is 1. 813" ( 46. 05mm ). Overall thickness is 0. 5" ( 12. 70 mm ).