12mm thick carbon steel or SS;
Tread options:
solid wood, laminated glass, marble, granite or steel;
Tread thickness:
1) Glass: 10+1.52pvb+10mm or 12+1.52pvb+12mm;
2) Solid wood: 38mm or customized;
3) Stone: 30mm or customized;
4) Steel: 6mm or customized;
Railing options:
glass rail, steel rail or without;
Riser height: 180--200mm;
Riser height: 180--200mm;
Stairs' width: 1000mm or customized.