KB Electronics KB-9832 Knob and Dial Kits for AC and DC Motor Controls Knob and Dial Kits for AC and DC Motor Controls Two Knob/Dial Kits are available. Both contain black knobs with silver inserts. Dial Plates are .040" aluminum with 3/8" mounting hole. 9832 Large Dial 9815 Small Dial Dimensions: large dial plate 2.25" x 2.06" small dial plate 1.62" x 1.50". Models where used: KBMM KBIC KBCC KBPB KBRG KBWD