Feature: 1. WIDE COMPATIBILITY: Specifically designed for reel to reel tape recorders, compatible for Revox Studer Revox, for Teac reel to reel tape recorders. 82mm diameter. 2. ANTI VIBRATION EFFECT: An adjustment dial is placed underneath the spool to compensate for warpage or thickness variance in the spool, use this adapter pad to enhance your setup and enjoy an immersive sound experience like never before, enhancing your home theater experience. 3. DURABLE MATERIAL: Nab HUB adapter pads are made of silicone material, soft and comfortable, easy to clean and long lasting. 4. HIGH TEMPERATURE RESISTANT: The Nab HUB adapter gasket is high temperature resistant with high thermal conductivity and electrical insulation. 5. EASY TO USE: Easy to install and remove, the NAB adapter gasket is small and lightweight, easy to install and remove. Its precise measurement guarantees a secure and stable connection. Specification: Item Type: Nab HUB Adapter Spacer Product Material: Silicone Color: Black Diameter: Approx. 82mm/3.2in Compatible AV Equipment Type: Professional Sound Equipment Suitable For: for Revox Studer Revox, for Teac Reel to Reel Tape Recorder. Package List: 2 x Nab HUB Adapter Spacer Note: All data are measured manually, and there are certain errors in the measurement results.