... information:1, Moulding sponge, not easy to change the shape.2, Thicken sponge backrest, humanization design, more ... 18mm, powerful and safe.4, Stainless steel big round base, Anti Aging Performance, Anti abrasion.5, fixing and ... one to you.Q: Can we change the base into stainless steel base:A: Of course, we can change it ... to add $12 to change the base.Q: If we don't need the footrest, how much we can ...