• Patent Pending
• Durability: Customized Industrial spring combined with metal fabrication in California ensures a strong dependable product that has a quite spring
• Warranty: All metal mechanisms are covered for 1 year. 
• Pound for pound Grodex spring carries the heaviest Air filled bag on the market. Fastest action spring on the market. The spring allows the bag to simulate fight movements at a fast, realistic pace, which is great for a shoulder and conditioning workout. 
  
• This is designed to feel like a mitt workout. Great cardio, shoulder endurance training, timing, rhythm, and timing. 
• International Shipping - Please see our FAQ page for further support

The Cobra bag is a reflex specialized punching bag that is great for professional use. Suction cups can hold the bag down. The small metal base allows the user to get close to the bag and a high-grade carbon steel spring for maximum action.  Exclusively manufactured by Grodex Inc. in San Francisco Bay Area California.

• 1-year warranty on Spring
• No Warranty on Punching Ball Bladder
• Height-adjustable telescopic pole
• Weight of packaging  24lbs

Bag Height from 36" to 51" 

Real Genuine Cowhide Leather

High Performance Customized Carbon Steel Spring

18" by 18"

July 18th, 2025 - Limited supply Presale