For glass railings, the price is primarily driven by the type and thickness of the glass. Tempered glass is the standard, but Laminated Tempered Glass (e.g., 5mm+0.76PVB+5mm) is safer and more expensive. The spigot or channel material (usually SS316) also adds to the cost. Ensure the glass has polished edges and pre-drilled holes for hardware, as on-site modifications are impossible after tempering. Prices will also fluctuate based on customization requirements like frosted, tinted, or low-iron (ultra-clear) finishes.