Features: Elevates your auditory experience with the Nab hub adapter, provide fluently tape control for 1/4 reel to reel tape recorders. This accessory ensures a stable and secure platform for your auditory devices, complements any setting. For highly quality sound and easy to use solution for their auditory setups. Widely used for home entertainment , office or any location where superior sound quality is desired. Easy Installation: Nab hub features outer diameter of 57mm, easy to replace for your tape Recorders.. Specifications: Size:about 5.7x5.7x1CM/2.24x2.24x0.39in Color:Black/Silver Quantity:1PCS/6PCS Note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color. Package includes: 1/6PCS Nab hub Adapter