The Schrader Valve Core Housing Ch3 Is An Essential Component Used For Tire Valve Maintenance And Repair. This Housing Is Designed To Securely Hold The Valve Core; Which Is A Small But Crucial Part Responsible For Maintaining Proper Tire Pressure. With The Ch3 Housing; You Can Easily Replace Damaged Or Worn Out Valve Cores To Ensure The Integrity Of Your Tires And Prevent Air Leakage. Core Housing Ch 3. Suitable For 218 A Ao771/0207 And 220 A.