Rotor head O ring size - GTD pump.

[ELVIS]

 O ring on my rotor head on GTD pump has gone south.

Need one asap so cant wait to order one from Baxter. Uncle reg has offered to post one aswell.

Anyone know exact size in hope i can pick one up from hydraulic supplier/bosch agent ( bank holiday in UK tomorrow so not holding my breath!)

Anyone?

cheers

Elvis