RBS has found at times you will lose the seal in the back of your pump which in turn ruins the bearing.
This bearing is also used in #2500-0007G Enderle mag drive cup.
Fits all Enderle bolt on or quick release fuel pump extensions. Dimensions of the bearing are 1.180" in dia., .275" thick and .670" I.D. Bearing is sealed to keep oil in engine and fuel out of bearing if the fuel pump springs a leak.