Kent Bus RTPI Pole KBRTP3000/3; 3000mm Overall Height; 3mm Wall Thickness; 101mm Diameter; Grade 316L Stainless Steel; Bright Satin Finish; Cast in. The Kent Bus RTPI poles offer a sturdy solution to the installation and mounting of RTPI (Real Time Passenger Information) display cases. The freestanding poles come in 3000mm lengths with a range of options available. An integrated lockable door is provided as standard as well as a cable entry point. These poles were designed to incorporate new RTPI displays for Dublin Bus. They are available in under-mount and side- mount variations.