Good quality rubber,solf and very flexible,easy to install,would not harden or crack over time through from hot or cold temperature changes. Designed for HID and LED headlight kit,make the headlight kit clean and tidy. Seals your retrofit LED assemblies and protects them from water condensation,moisture,dust,and other unwanted substances into your headlights or fog lights,keep all the lights working fine. Waterproof and dustproof housing cover suit for protecting the headlight against rain,wind and sand during the trip. Protect your HID conversion kits,perfect for retrofit lighting assemblies. This rubber housing seal caps only work for 83mm diameter lights housing,please double check with your stock headlights housing before purchase. Package Include: 2 x Car Headlight Dust Covers