These are compatible with Daikin air purifier silver ion cartridges. I purchased these in bulk for regular replacement, but I am selling them because I have decided to dispose of the air purifier itself. - Brand: YUKI TRADING - Product Name: Air Purifier Filter - Quantity: Set of 2 - Size: Approximately 16.8 x 4.5 x 6.5 cm - How to Use: Replacement filter for air purifiers Thank you for looking.