These are standard-style, replacement halogen headlight bulbs – #9005 size, 100 watt. The 90-degree bend differentiates these from the 9005XS, which are straight. The icy blue tint on the glass cuts out the yellow tint normally seen on most halogen headlights. It does not result in a truly blue tint, as seen on some European-style headlights. Sold in PAIRS.