Inquiry (采购产品): Bathroom Vent fan filter I need to replace the filters in my bathroom ventilation fans. They are made by D-Mark Inc. The only identifier is U.S. patent # 4,227,904. The filter is in a metal frame 6 1/2" by 7 1/2" and 3/8" thick. There is a metal ringed hole slightly off-center to accomodate the retaining screw. Can you help? **** Hidden Message ***** Geoffrey Gathercole 33186 USA Company: Not So Tall Tale Tellers E-mail: mrgeeee@bellsouth.net **** Hidden Message ***** mrgeeee@bellsouth.net