General box filter: Rectangular, 1 cm thick, with good filtering effect; cut into various sizes to fit boxes, suitable for most boxes , Remove odor.Purpose: A good solution to the problem of unpleasant smells in boxes, do everything to remove odors, keep and clean smells, keep your pets in good health and mood, and let you live a with your pets.Easy to install: just put the replacement filter into the vent on the top of the litter box, and then the filter has a strong absorption effect, allowing the litter box to maintain a and clean smell, just like a new one.High-quality materials: Environmentally friendly activated carbon materials have good absorption, the good effect of the filter can last a long time, disposable filters, it is not recommended to rinse them.colour:BlackMaterial:Activated carbon fibersize:15.5 x 16.5cmPackage Contents:6 x box filterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.