Helexon Technology Hongkong Limited is a professional and experienced manufacturer and distributor of Fiber Optical products, including various SFP/GBIC, CWDM modules and overstock products, that can be used on most of major switches such as Cisco, 3Com, Extreme, Nortel, HP, Nortel, Finisar and so on. We also gladly offer 3rd party but compatible GBIC/SFP products to fit our customers specific requirements. The product? S compatibility and reliability is 100%.