Replacement silicone o-ring for classic Chugger stainless pump head (28417 / 28418).

Compatible with the following Chugger pump models:

• CPSS-IN-1
• CPSS-IN-2
• CPSS-CI-1
• CPSS-CI-2
• CPPS-IN-1
• XCPSS-CI-1
• XCPSS-IN-1
• TRI-XCPSS-CI-1
• TRI-XCPSS-IN-1