Transducer Ultrasonic 25khz (4 pieces) MK-109C 349 25 DIA X 20 MM free shipping

Description

HELLO EBAYERS , UP FOR  "BUY IT NOW "  ARE  ULTRASONIC TRANSDUCERS MADE BY MASSA ,,, THESE ARE NEW OLD STOCK NOT USED,, YOU ARE BUYING IT NOW FOR 4 PCS,,, FREE GROUND SHIPPING IN USA .   WE DON'T KNOW WHAT THE FREQUENCY IS FOR SURE , WE THINK THEY ARE 25 KHZ BECAUSE WE HAVE BEEN SELLING THEM FOR A WHILE ON EBAY AND A BUYER GOT BACK TO US THAT DID TESTING ON THE ONES HE BOUGHT AND HE SAID THEY ARE 25 KHZ? THERE IS A 349 STAMPED ON THE BACK OF THE TRANSDUCER AND ON THE BOX THEY CAME FROM IT SAYS MK-109C  42A   THEY MEASURE 25MM  IN DIA  AND 20 HEIGHT NOT INCLUDING THE RCA PHONO FEMALE CONNECTOR THEY WERE MADE IN USA IN 280 LINCOLN STR  HINGHAM , MASS ....  THANK YOU FOR READING AND MESSAGE ME IF YOU HAVE ANY MORE QUESTIONS ...