A 1.Sorry, we cant provide this service.Before production, please provide details information . And before you place an order,we will send sample to test
2.Through testing , we will arrange the production . Quality control department will test pipe random while the goods be finished. Or we can send random small pieces to test again
3.Our rate of finished products is over 95% and some size are more higher
4.We will send more as compensation if the quantity is beyond the rate of finished products in next order.