Item Type: Aluminum Profiles Connector Model: 4040 2 way. Material: Aluminium Profiles Function: Fixed Flange Base Package List 1 x Aluminum Profiles Connector Please match the correct size when using. 1Fixed Base: Suits perfectly for connection in the track, the aluminium profiles connector is very practical. 2Firm Fixing: Comes with high hardness and enhanced durability, has wide compatibility for broad application. 3Slot Design: The slot design will not only enable using on plane, but also largely facilitate the assembly. 4Good Material: Forged with high quality aluminium profiles material, not easy to deform, ideal for long use. 5Easy to Install: Has 2 way design, which ensures firmer support and more convenient installation as well.