About product and suppliers:
            5,840 circulating head products are offered for sale by suppliers on Alibaba.com

A wide variety of circulating head options are available to you, 

There are 1,422 suppliers who sells circulating head on Alibaba.com, mainly located in Asia. The top countries of suppliers are United States, China, and Taiwan, China, from which the percentage of circulating head supply is 1%, 99%, and 1% respectively.