Pretty sure this says 20 nm.

https://mega.co.nz/#F!sMkUXZ6T!Y9mNF1CGfzNTefmd1EeC2Q

http://webcache.googleusercontent.com/search?q=cache:47cOerSqJtIJ:swiftminer.com/about-us/+&cd=1&hl=en&ct=clnk&gl=us


Edit: removed snark - feel free to add your own.