About product and suppliers:
            12 china double ring antenna products are offered for sale by suppliers on Alibaba.com, of which access control card accounts for 8%. 

A wide variety of china double ring antenna options are available to you, 

There are 12 suppliers who sells china double ring antenna on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of china double ring antenna supply is 100% respectively.