Features: Ensures seamlessly communication with our volumes control and channel selector knobs, maintaining the same high quality as original parts. These replacement knobs are crafted from plastic, ensuring long lasting performances and reliability in critical situations. Ideal for professional, and radios who require dependable communication tools in their daily operations. Perfect for use in emergency services, security operations, or any field requiring constant and reliable radio communication, minimizing downtime and maximizing efficiency. Upgrading your radio equipment with these replacement knobs, ensuring compatibility and ease of use, while keep your communication clear and uninterrupted. Specifications: Component:Plastic Size: Approx.1.50cm/0.59inch Size: Approx.1.9cm/0.75inch Color:Black For PD530 PD560 PD580 PD700 PD780G Package Includes: 1 Pair Volumes And Channel Knobs note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.