Wells Gardner K4600 Series Black Level Control Potentiometer VR201 used on the interface pcb. .25 Watt 350VDC Maximum operating voltage 20% tolerance. 2.5K pot that will fit the board perfectly and can be mounted on either side to make adjusting it easier and safer. This pot will work on all the versions of interface boards for the K4600 & K4700 P297, P298, P302, P305, P305, P306, P307, P308, and P317. If you have a P317 PCB you may need the vertical mount version of this pot which is the P1027 in our trimmer potentiometer catagory.