KWON Crushing Plates are made of hardened plastic with a break point in the middle. These plates can be used repeatedly, simply by pressing the pieces together after crushing. All crushing plates are padded on both sides and have PU foam to protect joints, especially the ankle joint when crushing with the foot. Available in two different strengths. Colors: Yellow, red and black Sizes: Yellow (S) 23 cm x 30 cm x 1.0 mm (easy) Red (M) 24 cm x 34 cm x 1.6 cm (medium) Black: (L) 28 cm x 28 cm x 1.0 cm (master level)