Our stair tread is made of steel grating, widely used for different types of steel ladders and stair system, featuring easy installation, strong structure & aesthetic appearance, and good water permeability. We can fabricated according to customers' sizes. There are 6 types of treads distinguished by different nosing and installation. XN1: Without Nosing, welding fixing XN2: Without Nosing, bolted fixing. XN3:Checkered Plate Nosing, welding fixing. XN4: Checkered Plate Nosing, bolted fixing. XN5: Vertical Striped Plate Nosing, welding fixing. XN6: Vertical Striped Plate Nosing,bolted fixing.