The PING CFS (Counterbalanced Feel System) Distance steel iron shaft in stiff flex is a lightweight option known for its high launch characteristics. It's typically found in PING iron sets and is designed to provide a smooth feel and promote a higher ball flight. 

Key Specifications:

• Flex: Stiff.
• Weight: Approximately 105 grams (34.5" length). Other sources suggest it could be around 115g raw weight (109g trimmed).
• Tip Diameter: .355 taper.
• Kick Point: Low, contributing to a higher launch angle.
• Feel: Designed to feel smooth and balanced, with a focus on consistency and timing.
• Launch: High.
• Swing Speed: A good fit for swing speeds between 75-85 mph.