These are two pieces of rubber housing Seal cap, which is used for changing the original headlight bulb seal cap. It is made from durable rubber material, would not harden or crack over time through from hot or cold temperature changes. This rubber housing Seal cap can prevent any water condensation, moisture, dust, and other unwanted substances enter into your headlights or fog lights, keep all the lights working fine. Good for HID conversion kits, aftermarket LED headlights, retrofit headlights, and many more of your Retrofit Lighting assemblies note: this rubber housing Seal caps only work for 75mm diameter lights housing, please double check with your stock headlights housing before Purchase. Package included: 2 x car Headlight dust cover