NX-322-B Nexx Racing Introduces Multi Length Plastic Disk Damper Set for Kyosho Mini-Z MR02 and MR03 (For Lexan Body) (BLUE)Features: With an upgrade from NX 148, NX 322 uses TWO PLASTIC DAMPER DISKS. The Plastic Damper Disk comes in two size, Diameter = 12mm or 15mm. D = 15mm Plastic Damper Disk comes in two option, Smooth or Low Friction Contact Surface. D = 12mm Plastic Damper Disk only available with Smooth Contact Surface. Suitable for Kyosho Mini Z MR02 and MR03. Material: Plastic Metal Carbon Fiber. Color: Black Blue Orange Red 4 steel spring sets of different