Original E3D heatsink for 1.75mm filament for the v6 hotend. This parts dissipates the heat quickly, so filament doesn't melt too early.
The v6 Heater Block has been upgraded to clamp both the heater cartridge and thermistor in place. These design improvements improve the thermal response of the HotEnd and make thermistor assembly easier. - See more at: http://e3d-online.com/E3D-v6/Spares/v6-Heater-Block-and-Fixings#sthash.KSArPNxT.dpuf
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