Feature:1. Complete Kit Compatibility: The kit includes six shape retaining pucks and two O rings, suited for REVOX and for Studer reel to reel tape recorder adapters, ensuring comprehensive functionality.2. Rubber and ABS Materials: Made from premium rubber and ABS, these components are designed for precise fitting, wear and tear proof, ensuring reliability and long lasting use.3. Enhanced Grip Performance: Specifically designed to increase friction and prevent tape reel slippage, the rubber ring ensures a secure locking mechanism for your reels, maintaining optimal functionality.4. Superior Craftsmanship: This NAB hub adapter O sealing ring is professionally manufactured to provide the performance and dependability you expect.5. Easy Installation: The NAB hub adapter O ring is easy to install and replace, simply remove old parts and put the new one in its place, convenient for daily maintenance.Specification:Item Type: NAB Hub Adapter O Ring KitMaterial: Rubber, ABSApplication: for REVOX NAB Hub Adapter.Package List:2 x Rubber Rings6 x Pucks