Thank you for taking a look. doc's streamer placement filters are for docstream fountains PLWF005 , PLWF115, PLWF 105 The PETLIBRO 8 Pack Docstream Filters are compatible with all Docstream fountains, providing a convenient solution for keeping your cat's water clean and fresh. Made by the trusted brand PETLIBRO, these filters are designed to easily fit into your Docstream fountain, ensuring a secure and snug connection. With this pack of 8 filters, you can have peace of mind knowing that your feline friend will always have access to clean water. Keep your pet's hydration needs met with the PETLIBRO Docstream Filters.