Pot is by Alpha Korea and seem to a wee bit more than 10% tolerance. Examples of this pot typically measure from 225K to around 235K and are well within the ohmic ballpark for use with your single coil pickups. Bottom shaft if 8mm diameter, top shaft 6mm. Chrome knobs are very nicely made and fit the shafts as they should. Bottom knob measures 19mm diameter, top knob 15.09mm diameter. Pot diameter is .647", overall depth is .784". Interesting choice for your custom bass or guitar?