The HW4-J01 is an essential accessory for the HW4 track system from Prolux, available in both white and black. This joiner is specifically designed to seamlessly connect segments of the HW4 three-circuit track, enhancing the system's versatility and functionality. One of the key features of the HW4-J01 is that polarity is not an issue with these straight joiners, simplifying the installation process and ensuring a smooth, continuous track layout. This component is crucial for creating extended track lighting configurations in commercial or retail spaces, providing a reliable and efficient solution for various lighting needs. The HW4-J01 is a valuable addition for those looking to expand or customize their HW4 track lighting system.