1. 12 volts 2. assemblied into pump 3. Iso TS 16949 certified 4. OEM quality to pump 4. Material : alloy Welcome to Ningbo Shuntian Fuel Injection Equipment company, we have more than 40 years experience in making diesel engine parts Nozzle, plunger, injector, pump, common rail parts. we are an ISO TS 16949 certifited company and have 400 workers.Thank you