About product and suppliers:
            130,646 hollow products are offered for sale by suppliers on Alibaba.com, of which steel pipes accounts for 2%, synthetic fiber accounts for 1%, and moulds accounts for 1%. 

A wide variety of hollow options are available to you, such as erw, hot rolled, and cold drawn. You can also choose from 20#, a106(b,c), and 10# hollow, as well as from thick wall pipe, api pipe, and emt pipe hollow, and whether hollow is structure pipe, or fluid pipe. 

There are 60,120 suppliers who sells hollow on Alibaba.com, mainly located in Asia. The top countries of suppliers are India, China, and Pakistan, from which the percentage of hollow supply is 1%, 97%, and 1% respectively.