Abarth 500 bulb type AUXILIARY STOP LIGHT

What type of auxiliary stop light bulb fits on a Abarth 500 . Product line COOL BLUE INTENSE Order no SKU 2825HCBI ECE category,¬†fitting W5W Technical data¬†(voltage, wattage) 12V 5W W2,1×9,5d Description Bluish-white light for xenon look Up to 20 % brighter(1) Color temperatures up to 4,200 K Ideal for use in clear-glass headlights