I am satisfied with the structure and standard of goods Three stages, but I think that it is even better if you can buy one step separately (because the second row will be done soon and it will be difficult to see)
For each manufacturer, the way the numbers look is subtly different. It is familiar. As it is a civil engineering site, it will inevitably bite soil, the middle step will be worn out and it will not be visible. So it is saved if there is a spare in the middle stage, but it does not seem to be. It may not be necessary because the price is cheap.