Supco Exact Replacement Defrost Heater SH10031 for GE part number WR51X10031. Glass Tube Heater. Glass measures 7-1/2". Terminal to Terminal Measures 9". Wire Harness and Defrost Thermostat Included. Defrost Thermostat is L60-32F. Defrost Thermostat Clips Onto Tube. Replacement for numbers WR51X10031, AP2071523 and PS303762. It is designed to fit specific GE manufactured refrigerator models including Hotpoint and RCA.