Wiseco forged piston:

Wiseco forged pistons (high-quality steel) are fitted as standard to a large range of motorbike brands.
The manufacture and anti-friction treatment of forged Wiseco pistons give them a longer lifespan, better engine response and reduce the risk of seizure.
The Wiseco forged piston is an essential component for maintaining and repairing motocross bikes.
Standard compression
Replacement piston ring product no. ZV9600
The piston kit includes:

• 1 piston diameter (95.96 mm)
  
• 1 gudgeon pin
• 1 set of piston rings
• 2 circlips

(Actual product may differ from photo)