The height can be adjusted between 35-45 cm. The sponge on the seat is slightly raised, but it has been like that from the beginning. This is a used item, so there are some stains and deterioration of the plastic parts, but it is still perfectly usable. I will disassemble it by removing the screws and ship it. I wiped it with an alcohol sheet, but please forgive any remaining stains. Please consider purchasing only if you understand that this is a used item with stains.