This part is an OEM from the MTD manufacturer. The compression spring (.41 x 1.5) is compatible with many lawn tractor machines. The metal spring often secures the seat stop to the seat pivot bracket. Please be sure to refer to the specific manual and diagrams for repair instructions. This item is sold individually. A wrench and a screwdriver may be necessary for the replacement.
OEM stands for Original Equipment Manufacturer. Simply put, this means that the company who made your appliance is also supplying the replacement part for it.