Home / Replacement parts / Control Box and Components / Knob for potentiometer (Knob) Knob for potentiometer (Knob)$2.41 Knob for potentiometer (Knob) quantity Add to Cart SKU: Knob Category: Control Box and Components Product ID: 2481 Description Description Replacement knob for potentiometer that controls spray time adjustment Related products One Button Remote Control Transmitter (RCT-LR) $7.80 Add to Cart Control Box, Analog Clock, Remote Ctrl, No Float (CB-A-RONF) $400.66 Add to Cart Analog Time Clock 120VAC (FM1QTUZ-120) $89.88 Add to Cart