Thank you for viewing. This is the genuine Combi option part, the "Fit Mat." It's an auxiliary item for securely attaching a child seat. It prevents damage to the car seat, and is effective when the center of the seat is sunken, the car seat is too soft, or the car's seat buckle is too long. ■Brand: Combi ■Product Name: Fit Mat (Child Seat Option) ■Size: Approximately W410 x D450 x H30mm (Please note that there may be some errors due to amateur measurements.) ■Condition: There are scratches, but the material has not deteriorated, and it is sturdy and in a condition that can be used without problems. ■Product Description: ・Allows stable installation even if there are steps or dents in the car seat. ・Firmly supports the child seat's seating. ・Genuine option part to protect your child's safety more reliably.