The hot surface ignit is premium nitride construction, White high temperature coated leads, part number spec lead size connect f quick mount Rated voltage: AC 120V 10 percent -15 percent .50 or 60HZ Coldresistance:18-40 ohm (ohm) Rated current at 17 sec: 1.1-1.2 amps,voltage:l120v-132v. You can measure whether the Hot Surface Ignit is wking properly with a multimeter. Hot side igniter or igniter temperature: 1100Celsius at 102V or 17 seconds . 1180Celsius at 120 V or 17 seconds , 1400Celsius at 132 V or 17 seconds .Common repair replacement with HVAC CONTROLS, Janitrol, Furnace, Janitrol Furnace, etc Furnace Hot Surface Ignit or Igniter Compatible models: DMS90453BXA, P1256701F , P1256707F , DMS90703BXA, P1256702F , P1256708F , DMS90704CXA, P1256703F , P1256709F , DMS90904CXA, P1256704F , P1256710F , DMS90905DXA, P1256705F , DMS91155DXA, P1256706F , GCS90453BXA, P1257201F , P1257207F , GCS90703BXA, P1257202F , P1257208F , GCS90904CXA, P1257204F , P1257209F , GCS91155DXA, P1257206F , GCV90704CXA, P1257803F , GCV90905DXA, P1257805F , GDS80453AN, GDS80453ANAA , GDS80453AX, etc Item Igniter General Silicon Nitride Hot Surface Igniter F or NG Type , easy to replace install. type:B Colour:White Material:Metal Package Contents: 1 x furnace replacement ignits Only the above package content, other products are not included. Note: Light different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.