This rotary knob with an insert shaft is ideal for controlling volume and channels on intercom devices. Its user-friendly design ensures easy and accurate adjustments, while the materials keep performance. practical for enhancing the functionality of your communication equipment, this knob is a must-have for any intercom system. Features -Color:Black -Material:Plastic -Size:1.50X1.50X1.50cm/0.59X0.59X0.59in -Size:1.00X1.00X1.00cm/0.39X0.39X0.39in -Effortless installation: replace your knob quickly and easily without the need for assistance. -Exact adjustments: the ensures smooth and accurate adjustments of volume and channels. - material: crafted from plastic, this knob is resistant to wear and tear. -Secure threaded design: the threaded design provides a secure fit and easy installation. -Universal compatibility: suitable for use with intercoms, radios, and other electronic devices Package list: 2pcs x knob cap( )