The Holographic Rainbow Downstem measures 4 inches and is designed with a unique holographic rainbow finish. It is a smoking accessory that provides both style and practicality, as it is made from high-quality, durable materials and can fit a variety of water pipes and bongs. This particular downstem is suitable for use with smaller or more compact water pipes due to its 4-inch length. It is perfect for smokers who value both aesthetics and performance in their smoking accessories.