Crystal Gel Refill 64oz.

Simply open the Crystal Gel jar and place out of the way, near the source of the odor. It works effortlessly for up to 90 days based on the ambient air flow. The Crystal Gel will dissipate over time so you'll actually see when it needs to be replaced. Use the Crystal Gel to remove tough odors that come from kitty litter, dampness, mold, bathrooms, and more. 
No. 005: 16 oz. crystal gel 
No. 067: 64 oz. crystal gel refill