This one is a refrigeration capillary tube assembly.
»Brand: Daikin
»Part name on label: ASSY, CAPTUBE (SL28)
»Material: Copper tubing
»Design:
Capillary tube integrated with additional sections (likely a strainer, joint, or pressure equalizing section)
Factory-brazed connections
Pre-formed bends for a specific Daikin AC/refrigeration model