ITEM IS DUAL ELEMENT TRANSDUCER; FREQUENCY: 5.0 MHZ; MAXIMUM TEMPERATURE WITHSTAND CAPABILITY IS 800 DEGREES F; RECOMMENDED DUTY CYCLE FOR SURFACE TEMPERATURES FROM 200 DEGREES F TO 800 DEGREES F IS 10 SECONDS MAXIMUM CONTACT FOLLOWED BY MINIMUM OF ONE MINUTE AIR COOLING; NOMINAL ELEMENT SIZE IS 0.25 INCHES; HIGH-STRENGTH FLEXIBLE 6 FT. RIGHT ANGLE POTTED CABLE TERMINATING IN BNC CONNECTORS