Ceramic Nozzle
I came across this when one of the Reprap member was looking for hardened Steel Nozzle. HE quoted,"Wonder if anyone has experience with hardened steel nozzles? For flashforge http://www.3dxtech.com/mk10-hercules-a2-hardened-steel-nozzle-0-40mm/" Of course I heard of the ceramic nozzle... Thus this was what I got. http://3dobjectifying.blogspot.sg/2012/12/ceramic-hotend-part-1.html