Nexx Racing's Optional/Replacement Multi-Length DAMPER PLATE/DAMPER DISK SET. Provides faster, smoother and more consistent drivability thur handling and speed. Includes 2 sets of PLASTIC DAMPER DISK...12mm for smooth contact surfaces and 15mm for low friction contact surfaces all in one package. Includes 4 sets of Tuning Springs, Carbon Fiber Damper Plate, Cross Plate spacer, (4) sets of tuning springs, ranging from soft, medium, medium firm and hard, screws, collar and anodized screw cups, all in one package.