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1.The material of wheel is nylon
material of the hull is iron with galvanized.
2. this kind of roller mainly used for door & window. and which is easy to install and strong enough
Our company specilizes in accessary for door & window . and we have been in this line for many years. You can rest assured that we can supply you with satiafactory products and service.
If you want more details, please feel free to contact us or visit our website.
nylon bearing roller