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When you purchase the luggage Car Roof Racks,you should pay attention to below points:
1. Luggage Car Roof Racks main support part is made of aluminum alloy and high strength plastic (nylon mixed with glass fiber) .
2. The surface of Car Roof Racks should be gloss and consistent. There is no bumps and cracks;
3. Check the material thickness, see the joints are closely connected. After the Car Roof Racks is installed, to see whether it's easily informed or not.

The goods should be not over the limit 30-50kgs.  As well, the goods should be fastened or fixed in the luggage  Car Roof Racks and placed evenly.