Designed for use in compressors, this genuine replacement part is used to provide a seal and prevent leaks. It is red, made of rubber, is not part of a kit or assembly, and is sold individually. When this part is worn, you will notice leaks from your machine, and it will need to be replaced. As with most rubber seals, this part is known to wear with regular use of your compressor, and will no longer be able to properly seal when it needs to be replaced. It is found at the bottom of the air tank, and you will need a wrench to complete this repair. Customers rate this repair as Easy.