40ct EZ Cat Generic Refill Pads for All Cat Litter Box Systems 16.9x11.4 Same Less Than 1/2 The Cost-Free Samples Highly Absorbent, Easy to use, Our unique formulation of fluff, gel helps prevent leakage and odor release. Refill to fit Purinas Tidy Cats Breeze Litter Box System Holds up to 500 ML of liquid-about a weeks worth of urine and lasts up to 1 week per cat Absorbs and controls odor for up to 1 week for 1 cat 40ct FREE SHIPPING