Check the listing for details. Vitamix OEM - replacement variable speed control switch potentiometer NEW. Color: Black, Condition: New. Listed at 24.70 USD. Potentiometer to replace variable speed switch #15955 for Vitamix From a US supplier these are high quality pre-wired switches. Using the detailed instruction simply open your machine remove the old switch and connect the new switch. These are slide on connectors no soldering needed. We've sold over a thousand of these kits with everything you need to make the repair. This is the same switch you may pay $25 - $30 for from other sellers. If your blender (in the variable speed mode) skips speeds as you turn the knob you need a NEW variable speed switch. The company charges about $100 plus shipping to fix this part. You can replace it for less than $20. This is the switch that was used on the 5000, 5200, VM0101and others. Any model that has 2 or 3 wires (if you need the 3-wire version put it in the note section when placing order). Not for Professional 300 machines. If you need the 3-wire connection, please send a message switch is the same price we will send the 3-wire version. Comes with switch pre-wired and Allen wrench needed to remove drive socket. Printed directions included. If you need more information, please a send message. NOTE:You will receive either the 2 or 3 wire version depending on your request (2 wire is the default).