M-Tech W16W T15 Halogen 12v Series bulbs are made of high quality components, including quenched quartz glass and high quality stainless steel. As a result, the M-Tech bulbs have an average lifetime of around 300 working hours. M-Tech bulbs come with E-Mark approval, making them safe and suitable for use in the European market. This W16W T15 Halogen bulb has been designed for use with 12v series vehicles.