The SM 2905 is a specialized 4-brush carbon set designed for GATE-type alternators. These are commonly found in European-designed hatchbacks and sedans manufactured in India, such as the Tata Indica and the Fiat Palio/Siena series. Unlike standard 2-brush systems, this 4-brush (4 NOS) configuration is engineered to handle higher current distribution and provide more stable field excitation for vehicles with higher electrical demands.