AS ONE Az One Navis Crutches Suitable Height Reference: 157-178cm NST801M Lightweight and sturdy crutches, suitable for heights of 157-178cm. - Brand: AS ONE - Size: 157-178cm - Model Name: NST801M - Weight: Lightweight design - Features: Sturdy construction Thank you for viewing. I urgently purchased these online when I suffered a sudden lower back strain, but I no longer needed them by the time they arrived, so I'm selling them. I only opened the box to check the contents. They are new and unused.