These are eyeglasses from the brand "the bedford hotel," available at Megane Ichiba. The specifications are 47, □23, 145. Please refer to the Megane Ichiba website for further product details. Prescription lenses are installed, so you will need to replace the lenses yourself. There are no demo lenses. They were used 1-2 times and then stored in a case. The case was stored in a large box mixed with other eyeglasses (also in cases), so it has some scratches. Please consider this information when making your purchase.