These racks have been designed for a tailored fit that follows the body contours of the 2006- Citroen Relay MWB van, fitting snugly to the van sides. Standard Ply Racking. Hexa Grip Racking. Our Citroen Relay van racking and shelving units are made from heavy-duty, high-quality 12mm plyboard, which provides a strong, stable and durable build.