Replacement refrigerant identifier filter for Robinair refrigerant identifiers, including within R-1234yf machines. Filter should be changed if hose is discolored.

Replacement filter for:

• AC1234-4
• AC1234-4SL
• AC1234-9
• 16900/16910 CoolTech ID refrigerant identifier
• 16990/16995 Refrigerant identifier