Bluelet's 4D Deodorant, with the scent of Deodorizing Wash, achieves 99% disinfection and black stain prevention. - Brand: Bluelet - Model Name: 4D Deodorant - Scent: Deodorizing Wash - Quantity: Set of 4 - Features: 99% Disinfection & Black Stain Prevention Thank you for viewing. This is a set of 1 main unit and 4 refills. This was included in a set from Kobayashi Pharmaceutical, but it doesn't fit my toilet, so I'm selling it. If anyone needs it, please consider purchasing it.