Home / Shop / Burners, Parts, and Accessories / Power Flame Type C / C4/C5 / APEM Potentiometer Knob, PFI 480560 APEM Potentiometer Knob, PFI 480560 SKU: 10002334 Categories: C4/C5, Webster Description Description APEM MPKES90B1/4 Potentiometer Knob. 679-3545-ND PFI Part number 440450 Call for quote: 780-955-2723 or email info@arcticboilers.com Related products Power Flame, C4/5/6 Back Plate Assembly PC, PFI C24040 Power Flame, NO. 904 7-5/8 Inlet Ring, PFI X08671 Power Flame, C4/5/6 Damper Screen (Raw Finish), PFI C80433 6 Amp Low Peak Dual Element Time Delay Fuse, PFI 926140