This is the 15T Clutch Bell & Flywheel for the Traxxas Slayer Pro

Clutch Bell - 15T/Fiber Washer/2 E-Clip (Part # 5215)

Clutch Shoes & Spring (Part # 4146X)

Flywheel & Magnet-35mm (Part # 6542)

Flywheel Nut (Part # 5244)

2 Ball Bearings - 5x11x4mm (Part # 4611)

Split Beveled Cone (Part # 3281)