Deo-Sheet Regular Size for the Deodorizing Lab Toilet System, convenient with no need to change for 3 days. - Brand: Unicharm - Product Name: Deo-Sheet - Size: Regular - Contents: Dedicated toilet unit: 1 + Filter: 2 sheets + Mat: 4 sheets, approximately 2 weeks' worth - Features: Deodorizing Lab Toilet System - Replacement Frequency: Dog toilet from Unicharm equipped with a 3-day odor-eliminating system, the Deodorizing Lab, with no need to change for 3 days. Thank you for viewing.