Using the highest quality PolyUrethane, our commercial graded Bumper Plates are built for gyms, studios and serious lifters. PolyUrethane bounces back less than rubber, is odourless and doesn t tear, mould or fall apart. IWF Colour coded and matches IWF size specifications with each plate being 450mm in diameter. If you re looking for reliable high performing plates that you can count on for all of your lifts, look no further than the Cortex Competition Grade Bumper Plates.