We are the leading manufacturer and exporter of ultrasonic sensor and piezo ceramic disc in China, for the ultrasonic sensor, we can supply you with open type and water-proof type,The following is our price list: Item Price ( FOB SHANGHAI) Note TCT40-10T/R1 USD0.70/PAIR Open type TCT40-10T/R2 USD0.73/PAIR Open typeTCT40-12T/R1 USD0.67/PAIR Open typeTCT40-16T/R1 USD0.63/PAIR Open typeTCT25-16T/R1 USD0.63/PAIR Open typeTCF40-10TR1 USD1.05/PC Water-proof type TCF40-12TR1 USD1.05/PC Water-proof typeTCF40-14TR1 USD1.15/PC Water-proof typeTCF40-16TR1 USD1.15/PC Water-proof typeTCF40-18TR