We all know that is a hollow aluminum tubes, it has an outer diameter, an inner diameter, and the thickness of a wall, only clearly we know these data in order to build the school at the straight time to put it to a higher accuracy oh . I have had 14, 10, 15 as well as 22 straightener, are able to meet the needs of customers, oh, there is one point we need to know, whether it is brass or aluminum, straightener open The grooves are proprietary, meaning that if it is 4mm, then the straightener on the open slot of 4mm, which is not common, because brass and aluminum are special products, not have to say oh range . My company also has various types of alignment is on will try to meet the requirements of customers, and the company is temporarily straightening is the best domestic production companies, the majority of customers is the best place to buy straightener oh. I can also do wire, stainless steel wire, flat, spring wire and other various types of straightener oh.