This is the optional Hot-Racing Super Duty Large Slipper System for the Traxxas Slash 4x4, Revo, T-Maxx, Summit, Long Chassis E-Maxx & More. FEATURES: Handles high-powered brushless set-ups CNC aluminum and steel construction Metallic super duty slipper disk Thirty day limited warranty beginning at date of purchase- valid in the United States only INCLUDES: Slipper Pressure Plate Slipper Hub Super Duty Slipper Disk