Introducing the Adjustable Dumbbell 40kg from Rizhao Rongjia Fitness LLC, a leading manufacturer and supplier of fitness equipment in China. This versatile and convenient dumbbell is perfect for all your workout needs, whether you're a beginner or a seasoned pro. Featuring an adjustable weight range of 2.5kg to 40kg, this dumbbell allows you to easily switch between different weight levels with just a simple twist of its dial. This means you can seamlessly switch between exercises and target different muscle groups without having to constantly stop and switch dumbbells. Made from high-quality materials, this Adjustable Dumbbell is durable, strong, and able to withstand heavy use over time. Its compact and space-saving design makes it easy to store and carry around, perfect for home or gym use. So if you're looking for a reliable and high-quality adjustable dumbbell for your workout routine, look no further than Rizhao Rongjia Fitness LLC, your trusted China-based manufacturer and supplier of fitness equipment.