immsersed transducer pack Ultrasonic trandsucer Ultrasonic underwater transducer Immsered transducer ultrasonic immersed Ultrasonic immersed Transducer1, Can be putted into in liquid, by bottom-mounting or wall-mounting2 Frequency : 20Khz ,25khz, 28khz, 40khz , are pouplar type 3, Material : 304, 316 L , 2.0 Thikcness stainless steel shock co-branded, high-performance digital ultrasonic generator ...