Bosch 7MM elements for a M pump

PES4M70C321RS Injection Pump, application OM615.940. I haven't looked up the actual element number to see how pricey they are.

I also got a quote for some 10mm MW elements from a California aftermarket supplier. They are the same price as the 8mm ones @ $64.80ea.

I will order some samples in March for testing.