Type:Piezoelectric Ceramics Material:Glass Ceramic Material:Ceramic PZT transducer Frequency:0.6-7MHZ Diameter:10mm 12mm 15mm 20mm 30mm or custom Electrode:two side electrode thickness:0.4-3mm Quality contral:ISO&ROHS&SGS Business type:Factory and manufacturer Lead time:3-7days for sampels,1-2weeks for formal orders