These very correct factory color custom made factory identical seals were never available from the factory as an individual part. These are much higher quality than the original and even some other after market repros. seal the tail light lense to the tail light body providing a comfortable wear-free seat for the valuable lens and keeping the water out of the assembly. sold as a set and easily installed. if you have a water leak into the rear trunk, then simply remove the tail light body and reseal the tail light body to the rear panel with some silicone sealant.