INET Airport Systems' Service Transport Unit (STU) will carry all electrical/mechanical services across a telescoping boarding bridge in the most attractive method possible. The STU eliminates the need for pantographs or external cabling festoon systems. Any combination of power cables, chilled water, potable water, and communications lines can be custom configured in one device, either retrofit or factory designed on any brand of commercial boarding bridge. This design features full protection, zero maintenance and lightweight.