About product and suppliers:
            164,944 diameter products are offered for sale by suppliers on Alibaba.com, of which steel pipes accounts for 1%, plastic tubes accounts for 1%, and stainless steel pipes accounts for 1%. 

A wide variety of diameter options are available to you, such as api pipe. You can also choose from structure pipe, fluid pipe, and industrial diameter, as well as from round diameter

There are 77,264 suppliers who sells diameter on Alibaba.com, mainly located in Asia. The top countries of suppliers are India, China, and Taiwan, China, from which the percentage of diameter supply is 1%, 97%, and 1% respectively.