Hello,
That is not a J-head. It is the old "Geared Extruder Nozzle".
I don't know what you can replace it with. As far as J-Heads are concerned, only MakerFarm supplies a J-Head Mk IV-B made to the proper specifications of a J-Head. Almost all other J-Heads on the market are cheap chinese knock-offs that are not made to the proper specifications, have no support, and are of questionable quality.
The J-Head Mk V-BV is no longer available at [
www.hotends.com]. The market prefers chinese as it is cheaper.
Best Regards,
Brian
Edited 1 time(s). Last edit at 09/30/2015 11:26AM by reifsnyderb.