TOSHIBA 2SK30A GR MATCHED JFET PAIR USED IN HAFLER OTHERS FOR YOUR AUDIO NEEDS. IDSS MATCHED AS A SET OF 2 FOR N CHANNEL DIFFERENTIAL AMP TO WITHIN .1MA AT 10 VOLTS. THAT EQUATES TO <2% MATCHING. MOST MEASURE AND FIT IN THE 3.8 TO 5.6 MA RANGE . BE AWARE OF FAKES AS THEY ARE FLOODING THE MARKET. I PURCHASE GENUINE ONLY AND HAVE TO PHYSICALLY INSPECT AND TEST BEFORE I LIST. THE CURVE TRACER DOES NOT LIE. THANKS FOR LOOKING!NOTE FOR THE INQUIRIES: THESE TOSHIBA JFETS DIES WERE MANUFACTUED IN JAPAN AND ASSEMBLED IN THE THAILAND PLANT.