1.Material of the groove is aluminium,material of the wheel is nylon 2.strong enough and anti-abrasive 3.used for door&window

1.The material of wheel is nylon which is strong enough and anti-abrasive.

   material of groove is aluminium

2.this kind of roller can be used for door & window .

3. Different colour of wheel is available. we usuallly supply orange, green and white.

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 satisfactory products and service.

If you want more details, please feel free to contact us or visit our website.