A sample from the products for the Gasket Kit B include: O-ring,111x2.6, Gasket,water Pump, Gskt,miss,cover (nas), O-ring,13.8x2.5.
The Washer, 10.2m/m is the cheapest item from this partsfiche.
With two applications this O-ring 46.4x1.9 is the most specified part.