Hayward GLX-SD-ELEC-MOD PCB Replacement for Hayward Goldline Sense and Dispense Automation Pcb replacement Fits hayward goldline sense and dispense automation models aqlchem, aqlchem2, aqlchem2-240, aqlchem-upg, aqlchem3-120, aqlchem3-240 Also fits hayward goldline aqua rite pro salt chlorination and chemistry automation model aqr-pro Weight 1 pounds