Inquiry (采购产品): Replacement Filter We are looking for a replacement filter for a NuTone bathroom ceiling fan that has a D-Mark filter. The house was built in 1973. The filter measures 4x7 with a metal frame. U.S. Patent 5,124,177. You can also leave a message on the answering machine. Thank you, William and Bernice McClain **** Hidden Message ***** Bernice McClain 104 Graham St PO Box 441 Stanley, NC 28164 USA Company: NA Title: Mrs. Phone: 704-263-3689 E-mail: brncmccln@yahoo.com **** Hidden Message ***** brncmccln@yahoo.com