Step material: rock slab; Stairs: acrylic; the stair steps are made of rock slabs, which are fireproof, high temperature resistant, scratch resistant, wear resistant, impervious and dirt-absorbing. the acrylic stair handrails have excellent weather resistance, and can last for a long time without fading. The size can be customized, and the rock slabs can be selected in color. Batch works. for details, please contact customer service.