About product and suppliers:
            7,231 prototype products are offered for sale by suppliers on Alibaba.com, of which machining accounts for 80%. 

A wide variety of prototype options are available to you, such as micro machining, not micro machining. You can also choose from cnc machining, not cnc machining prototype, as well as from aluminum, precious metals, and copper prototype, and whether prototype is broaching, rapid prototyping, or laser machining. 

There are 7,231 suppliers who sells prototype on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, Taiwan, China, and Hong Kong S.A.R., from which the percentage of prototype supply is 96%, 3%, and 1% respectively.