Optimize your strength training with this king's feather with medium resistance. Ideal for versatile upper body strength training. Medium 40 kg resistance, perfect for the progressive trainer. Classic design, loved by fitness enthusiasts throughout time. The king's feather you have in front of you is not just a training tool, it's a timeless classic. Perfect for those looking for an effective tool to build upper body strength. The medium resistance of 40 kg provides enough challenge to help you reach your fitness goals. And if you are looking for even greater challenges, there is also a version with 60 kg resistance. How the king's feather works: When you pull the springs apart, you create a resistance that strengthens and tones the muscles in your chest, arms, shoulders, and back. The more you pull, the greater the resistance, which means you can adapt your training based on your own strength levels. Specification: - Type: Exercise equipment spring - Resistance: Medium 40 kg (alternative version with 60 kg available)