This part is a replacement valve spring. The intended use for this part is to properly replace a defective or broken valve spring in generators. This spring ensures proper equipment functionality but may become faulty over time due to corroding, stretching, snapping, rusting, or other damage. In such cases, this spring will require replacement. Always ensure that the equipment is completely powered off and is cooled down before attempting to start the repair process.This is an authentic OEM part from Generac and as such is sold individually and made from durable and high-quality materials. This valve spring can be used with generators manufactured by Generac, Siemens, Honeywell, and some other brands.