Simply stick it on ventilation fans in the toilet, bathroom, etc. to block dust! Makes cleaning the ventilation fan easy! The non-woven fabric sheet traps dust and dirt, keeping the ventilation fan clean. Can be used on various ventilation fans! Can be cut with scissors to fit the size of the ventilation fan. *Do not use in places where heat is generated, such as the kitchen. Size: 16 x 16 cm Contains 24 sheets