OD 0.5mm medical grade nitinol tube has been successfully developed by Mr Li in Hengxin company.

Here are some details about this new nitinol tube:

NiTi shape memoey alloy Capillary tube.

OD 0.5mm

Seamless

Standard: ASTM F2063

For  medical device

According to R&D department news, OD0.2mm nitinol tube is expected to be developed by the end of this year.