Thank you for viewing! I have updated my profile, so please be sure to read it. m(__)m This is an outing hammock that can be fixed to a hard carry case. It has 8 strings in total, with 2 strings on each side, so it can be securely fixed to the carry case. It has a pocket, so your ferret can sleep peacefully. The inside is fleece (anti-pilling) on both top and bottom, so they can stay warm. The back of the hammock is made of 13-ounce washed denim, so it's durable. It can be used for small animals other than ferrets. Hammock size: Approximately 30cm (length) x 30cm (width) (±5mm) String length: Approximately 30cm (±5mm) Carry case size in the image: Outer dimensions: Approximately 33cm (width) x 51cm (depth) x 30cm (height) ☆The carry case in the image is unused. ☆This product is thick, so it cannot be shipped with other items.