PETKIT Deodorizing Cube N60 Compatible Models: ・PUROBOT ULTRA ・PUROBOT MAX PRO Features: ・Decomposes and deodorizes unpleasant odors in the toilet from the source. ・One cube lasts approximately 2 months. ・Comes with a case for easy, mess-free installation. ・Safe, non-toxic, and non-irritating. Passes skin irritation and acute inhalation toxicity tests. ・Protects the health of your home and pets. Expiration Date: September 11, 2027