Inquiry (采购产品): Bonitron Ultrasonic Transducer DR4500 We need this replacement part.....can you help? Village of Harrod WWTP email arumer46@aol.com **** Hidden Message ***** john rumer p. o. box 225 harrod, OH 45850 USA Company: village of harrod Title: wastewater supt. E-mail: arumer46@aol.com **** Hidden Message ***** arumer46@aol.com