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Double Duty Litter Deodorizer with Advance Control by Arm & Hammer 30oz 850g US Imports Arm & Hammer™ Double Duty Litter Deodorizer with Advanced Odor Control. Eliminates feces & urine odors. #1 cat litter deodorizer brand. The standard of purity. Eliminates both. Feces odors. Urine odors. Directions: 1. In a clean, empty litter box, pour Arm & Hammer™ Double Duty Litter Deodorizer to cover the bottom of the litter box. 2. Add any type of cat litter (clay, scoopable, or natural) as usual. 3. Sprinkle deodorizer on top of litter and mix in. 4. Between litter changes, repeat step 3 to keep litter fresh. KECORP_S1