Ridgeback® 7.5cm Speed Ramp - 5MPH-8KM/H (Single Section) Size: 7.5 x 50 x 40CM Colour: Yellow Each Design optimises visibility for road users maximising performance. Effective interlocking system for easy connectivity and maintains stability before and after assembly. Innovative approach of using thermoplastic retro-reflective elements with glass beads for improved visibility. JSP Ridgeback Speed Ramp 5MPH Yellow/Black