ASSY, CAPTUBE (SL28)

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
 

Typical use:

»Daikin split AC units
»VRV/VRF indoor or outdoor units (small capacity sections)
»Precision refrigerant flow control