880 bulb is a single beam size. It is mostly used for the fog lights (2000-2005 Mercury Sable and 2002-2004 Nissan Xterra). 880 fits 884, 885, 890, 892, 893 and 899 bulb sizes.
880 size is available in HID sets. You may choose between 35W and 55W kits. Moreover, there are 12 color options available so you can find the one you like the most. Usually, 880 bulbs have plastic capsule holding rings which should be removed. For proper fitment, the bulb gasket should be reinstalled the same way as it is on the OEM bulb.
880 size is also available in LED sets. You can find LEDs with ETI and Cree Chips. LED Conversion kits with ETI Chips have separate divers to provide the separate power source for the fan and LED chips.The other LEDs are equipped with Cree Chips. This kit includes the pair of color filters so you can try and choose the color you like. The bulbs can be installed without them, to get the white light output.