Sierra International 65693P Lido 0-7000 Rpm Dial Range Electric Tachometer for O/B & 4-Stroke Gas Engines, 3" Sierra 65693P 3 inch Before ordering, please verify this is the correct part for your application. For assistance, please call sierra's Tech support at 1-877-663-8396 All sierra parts qualify for and are Covered under sierra's industry leading customer satisfaction Warranty