Glass Stair Staircase 9004-12 Staircase Technical Information: Steel Materials: Stainless Steel SU316, SU304,Mild Carbon Steel. Stainless Steel Surface Finish: Satin polish & Brush finish, Mirror Polish, Titanium Gold. Stair Tread Material: Toughened Safety Glass, Oak and Beech wood(can be painted to other colours). Note: 1. Customers design is available. 2. Sizes and materials can be changed. 3. Price varies on material and dimensions. 4. Design and produce according to architectural sketch. Design will be sent for your confirmation before production. 5. Installation: just screws will be ok. No need welding.