Composition element control designed for applications where bushingless controls are required. Phenolic shaft insures insulation if control is used on a hot chassis. Pot can be adjusted from the top by screwdriver (or knob on 1/4 knurled shaft) or from the bottom of the chassis. Great for antique radios. 24mm body2" solid shaft length1/4" diameter. 2M linear. Twist tab mount.