Feature:1. Wide Compatibility: The NAB adapter spacers are specifically designed to pair the XLR connector with the NAB BNC connector for seamless compatibility between these two different connector types.2. Easy To Install: These spacers are very easy to use. Simply place the spacers between the XLR connector and the NAB BNC connector to fill the space between them. This ensures a more secure connection and prevents instability during insertion and removal.3. Application: Place the reel adjusting disc under the reel to compensate for warped or varying reel thicknesses. Suitable for all models of reel to reel tape recorders.4. Enhance Signal Transmission: Reel adjusting disc spacers help to improve the quality of signal transmission. Signal interference and distortion are reduced for clearer, more accurate sound or video signal transmission.5. Durable Material: These reel adjusting discs are made of durable silicone material that provides a degree of elasticity and shock resistance to ensure a strong connection between connectors.Specification:Item Type: Reel Adjusting DiscMaterial: SiliconeColor: BlackSuitable: Reel to Reel Tape RecordersPackage List:2 xReel Adjusting DiscNote:Manual measurement, please allow some errors.