The photo shows a circular mounting assembly with two black ports, red seals, a gray frame and a release mechanism. Related A-Series catalog reference: 801-0631-00099-00 (CO2 bypass assembly). Confirm the label, machine model and assembly revision before ordering. Source: Mindray A5 Operating Instructions, Appendix B.2-B.3, https://www.mindray.com/content/dam/xpace/en_us/service-and-support/training-and-education/resource--library/technical--documents/operators-manuals-2/A5-%28Canada%29.pdf
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Provide the machine model, assembly label and connection photos to confirm the exact part number, revision and supplied components.