The 1325-13S is a seal specifically from the 1325-13 kit, tailored for Toyota CV joints. With an inner diameter of 1.000 inches, the seal has an outer diameter of 1.530 inches and a height of 0.175 inches. It is noted to be compatible with later model OSR Toyota CVs, which use the 1325-12 ball. Using this seal allows the 1325-12 kit to function effectively with OSR Toyota CV joints.