This is a necessary part every time you replace the compressor with a new one.
A blocked filter blocks the air supply and reduces the compressor's efficiency.
A leaky filter permeates contaminants which leads to irreversible destruction of the compressor.
  
Producer: WABCO (original for the first assembly)
Production: Germany
  
Outer diameter 1: 42mm
Outer diameter 2: 48mm
Input: 10mm
Output: 10mm
Height: 78mm