WINSINN3D Printer Sensor Heater Block, Compatible with E3D V6 J-Head RepRap Bowden Hotend Extruder For HT-NTC100K PT100 - Aluminum (Pack of 5Pcs)

Not bad overall, but a word of caution: these heater blocks are not actually V6 size, they are 0.5mm thicker than the official thing, although the other outer dimensions match. This means original e3d silicone socks won't fit properly. They do just about hang on though.To be fair to the seller, the actual product dimensions are in the description, but they don't mention the deviation from the original design.The general fit and finish of these blocks is good.

Will do the job just fine, thank you.