DSK-400 DSK-650/J, DSK-610/J, DSK-420, DSK-400, DSK-200, DSK400, XNine Contains Kevlar® brand fiber developed by DuPontKevlar is a high strength synthetic fiber which dramatically improves the performance of these medium density pads and gives excellent braking power Pad thickness: In 4mm, Out 5.5mm Product Code: OBE-DP01V