This is a set of 10 (20 sheets) Marukan Rabbit Ventilation Fan Natural Deodorizing Filters for rabbits, model ML-51. These are unopened items that were purchased as spares but not used. Please note that only one outer box is kept, and the rest have been discarded. (The outer box will be folded for packaging, please understand.) Also, please note that this listing is for the filters only, not the rabbit ventilation fans themselves, and includes 10 sets of filters. There are no noticeable scratches, but please refrain from purchasing if you are concerned about minor scratches or dirt due to storage by a private individual. - Brand: Marukan - Product Name: Natural Deodorizing Filter - Quantity: 2 sheets per set - Compatible Product: Rabbit Ventilation Fan Rabbit Deodorizing Filter Odor Removal Filter