Complete Kit: Includes 16916 Oxygen Sensor and 16913 Refrigerant Identifier Filter – This set includes both the replacement oxygen sensor (16916) and the refrigerant identifier filter (16913) for use with compatible R-1234yf machines and refrigerant identifiers. Works with Multiple Models – This kit is compatible with a wide range of models including AC1234-4, AC1234-4SL, AC1234-4-230, AC1234-6, AC1234-9, 16990/16995 refrigerant identifiers and more. Compatible with R-1234yf Machines – The 16916 oxygen sensor and 16913 filter are designed for use with R-1234yf machines and refrigerant identifiers, ensuring reliable and efficient performance. Restore Functionality with Easy Replacement – When your oxygen sensor expires, it prevents the machine from adding refrigerant. This replacement set (16916 and 16913) restores your machine’s normal operation easily. Reliable Performance – Using this complete replacement kit ensures continuous, smooth operation of your R-1234yf machine, helping maintain optimal refrigerant identification and recovery performance. 16916 - R-1234yf Oxygen Sensor