The Everpure EV910542 is a 20 inch replacement water softening filter cartridge for espresso machines designed to reduce scale forming minerals like calcium and magnesium.  Features:

• Reduces limescale build-up and corrosion in boiler tanks, heating elements, impeller, steam arm, etc. 
• Reduces downtime and maintenance costs while extending the life of expensive espresso equipment
  
• Drop-in design for use in Costguard filter housings
  
• Over all Dimensions: 20"H x 2.87" Diameter
• Service Flow Rate: Maximum 2.0 gpm (7.6 Lpm)
• Pressure: 30 - 125 psi (2.1 - 8.6 bar), non-shock
  
• Temperature: 40 - 100°F (4.4 - 38°C)