Most popular design Rubber or PVC speed bump affords maximum durability will not crack or rot and over speed protection. White and red acrylic glass- beaded for maximum reflectivity. Built-in reflectors for added safety and visibility. Specifications: PVC Material Bump Size: 1. 500 x 500 x 25mm 2. 500 x 500 x 35mm 3. 500 x 500 x 50mm Elongation(%):>300% Hardness(HS):65~75