Yangzhou Yada Industrial Group Co.,Ltd is a professional manufacturer engaged in the line of the disposable medical products, medicine ,metal products ect.as you know we have 8 factory manufaturer those products. All of our products are exported to the oversea markets such as west European , south east Asia counteris, Far east Asia countries, U.S.A ect.and we get CE certificate approval .we make Nasal Oxygen Cannual.We can offer you the samples free of charge .Friends who are interested in our products please feel free to contact me directly..Thank you