→about this question,Polifar has three method to solve your concern:
1.You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples.
2.You can send us your product specifications and requests,we will manufacture the products according to your requests.
3.We can accept you arrange preshipment inspection before shipment.of course,if order quantity exceed 100mts,we can apply free SGS test for first business.