Ultrasonic Piezoelectric Ceramic Disc 30x1mm PZT4 2Mhz Piezo Crystal Disc PZT Crystals Piezo Sensor PZT Transmitter Chips.
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Normal Type: 30x1mm, 28x1mm, 25x1mm, 30x2mm, 28x2mm, 25x2mm.
Frequency: 1mhz, 2mhz, 3mhz, 4mhz, 5mhz.
