These fit my ASU7RLF1 units (I have several) and they cost a great deal less than the OEM (which are around $30 for a single item and you need two items per head/cassette).They were packaged loose in a cardboard box, so any absorbtive capacity is likely lost. They should have packaged them in an airtight package.No information on product specs, etc either on the Amazon page or contained in the package. Unfortunate.