Features: Nab hub adapter spacer for reel to reel tape recorders easily meets your usage needs. Reel adjusting disc: Place disc under reel to compensatefor warped or different thickness reel, which is very convenient. Nab hub adapter spacer is made of composite material, soft and comfortable, easy to clean and long life. The nab hub adapter spacer is high temperature resistant with high thermal conductivity and electrical insulation. The nab adapter spacer is small and lightweight, easy to install and remove, easier to use. Specifications: Item Type: Nab HUB Adapter Spacer Material: Composite Size：approx 84mmx84mm/3.31x3.31in Thickness:approx 0.7mm/0.8mm/0.9mm/1.0mm/1.2mm Optional Color: Black Suitable For Reel To Reel Tape Recorders Quantity:2PCS Package Includes: 2PCS Nab HUB Adapter Spacer note: Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviationsdue to manual measurement.