This J-head V2.0 hotend is a combination of ideas from other nozzle designs combined with a goal to reduce the number of custom machined parts to a bare minimum.

The J-Head V2.0 has been proven to print reliably with both ABS and PLA. PLA will require a small fan to provide air-flow through the cooling vents milled in the sides of the nozzle holder.  

This hot-end easily interfaces with the most popular RepRap extruders, including Wade's Extuder, Greg Frost's Hinged Accessible Extruder, etc.

Features:

The J-head is assembled with 100K NTC thermistor and Cartridge heater,NOT heat resistor.Check the following specifications for the assembled heater.

Materail: Stainless Steel,PVC,Nylon

Voltage: 12V

Power: 30w

Wire Length :1m

Heater size: 6 x 15mm(D*L)

High-quality PEEK heat-insulated pipe.

Duralumin alloy nozzle.

Small size, light weight.

The PTFE is not stressed nor used to provide support. This reduces a point of failure that is part of other designs.

A resistor is used as a heater. There is no need to wrap nichrome wire or to bake a heater core.

The entrance is located at the PEEK tube inner side, which is more preferable for the implementation of the short-range extruders.

Noted:

4 optional nozzle size:  0.3mm, 0.35mm, 0.4mm, 0.5mm

2 optional filament size: 1.75mm, 3.00mm

Package list:

1 x Peek short-distance J-Head V2.0 Hot End & Cartridge heater. (Please Note:  Choose "Nozzle Size" and "filament size" you wanna)

More information please refer to the wiki page