This is an authentic DeWalt replacement part, sourced from the original manufacturer for use with air compressors. The special o-ring is commonly used to provide spacing and compression for the bushing. This o-ring is available as an individual replacement part, please see illustrated part list for associative parts.
The pressure switch is made out of metal and plastic. It is a genuine DeWALT replacement part for use in compressors. This part is available individually. When replacing this item a screwdriver and a wrench might be required during the installation process. This item will need to be replaced if it breaks.