This Standard Motor Products LDP12 Fuel Vapor Leak Detection Pump is a top-of-the-line Evaporative Emissions System Leak Detection Pump. It is manufactured in the United States and comes with a variety of interchange part numbers including 2-71011, ESM1003, 310-219, 4861959AA, 4861959AB, 4861959AC, VDC1006, 4861959AD, LDPB10001, 52855827AB, 4B1593, 52855827AA, 73-11903, 77653831, and VDP12. The pump is designed to help detect fuel vapor leaks in your vehicle's evaporative emissions system. It is a reliable and efficient pump that meets all necessary specifications for effective performance.