Ivivva Blue Tank With Vented Sides

Ivivva blue tank. Vented sides. Back keyhole. There is a tiny spot on the back at the bottom that looks like pen, see last photo. Otherwise it is in good pre-owned condition. Size 14. Lying flat the length is approximately 23 inches in the front and 24 1/4 inches in the back. It is approximately 16 1/4 inches pit to pit.