The OEM NOS ECHO Speed Feed 400 Head 99944200907B is a high-quality trimmer head designed for use with 2-stroke engines. Specifically meant for string trimmers, this black-colored unit is powered by gasoline and comes in a pack of 1. The ECHO brand ensures reliability and compatibility with various models of string trimmers. With a bulk quantity of 96 available, it offers great value for those looking to replenish or upgrade their trimming equipment.