The Blue-White timer knob is designed for compatible A-100 chemical pump applications where the control knob needs replacement. A timer knob is useful because it helps the user set and adjust the pump timing function more easily, supporting clearer control of feed operation.This replacement is especially useful when the original knob is cracked, stripped, faded, broken, or missing. Matching the correct white knob design helps preserve intended fit and dependable control access.The A-032N is a practical service part when a compatible Blue-White A-100 pump needs a knob to restore dependable timer adjustment support. Blue-White A-100 timer knob White finish Designed for compatible chemical-feed pump applications Useful when the original knob is broken or missing Supports cleaner and more dependable control adjustment