11208, O-Ring, Large
NOTE: the size of this o-ring as there are 2 that are very close in size, this one is:
Outside Diameter: 2-5/8"
Inside Diameter: 2-3/8"
Thickness: 3/32"
This is the larger of the 2 O-Rings that are for the Large 2" diverters, if you need the smaller O-ring it is 11209