1 piston rings for mercedes-benz 0M352 2 97mm*3+3+3+5.5+5.5 1 piston rings for mercedes-benz 0M352 2 97mm*3+3+3+5.5+5.53 first ring nodular iron,chrome. 2nd ring,3rd ring,oil ring cast iron.4 certification:TS169495 )we are also manufacturer for auto water pump and diesel water pump mercedes-benz piston rings om352
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