Chicken Hawk Racing Knee Sliders - Hard Version , Color: Black KS09-BLK-H Totally redesigned plastic pucks provide excellent feel and feedback Black Pucks come in two types of plastic, providing standard and harder levels of wear resistance; harder pucks are now much harder Pre-curved to fit all race suits Feature large leather backing with hook-and-loop fasteners to attach to all riding leathers Totally new shape is more curved for better fit