Specially Designed Safe Space for Puppies - This unique pen box constructed using 3mm tempered glass with MDF board, seamless connection, stronger than the regular glass, shatter-proof, each panel weighs 6lbs, remains robust in place, built with puppy pig rails along the sides to prevent crushing or suffocating the puppy caught between dog mom and walls, also designed with three more convenient entry doors for pets to go in and go out, no need to remove any panels, the latch lock ensures safety Spacious Interior Spaces - With a divider door panel on the center, this whelping box is divided into two of rooms, both includes a waterproof fertility pad makes it easy to clean up and prevent messes on the floor, one room designed for dog moms to rest , while another for newborn puppies to move around and sleep Tempered Glass Playpen Box - Featuring tempered glass panels with MDF, allow pets to see clearly whats going on around them, people easily see them inside and ensure their safety.