3qty 3D Printer Larger Size Brass Extruder Mk7 Mk8 Nozzles 1.0mm 1.5mm for 1.75mm Filament 2.0mm for 3.0mm Filament

I've used the 1.5 (for PETG) and 2.0 mm (for PLA) nozzles with my Ender 3 printer. So far they've both produced just what I was looking for after some reasonable tweaking to my settings.My only unexpected problem happened right at the beginning. These nozzles have larger "hexagonal pyramid" sections than I thought was standard for an mk8; see attached picture. The nozzle on the right is the 1.0 mm nozzle from this package (the 1.5 mm and 2.0 mm are the same in outer dimensions). The nozzle on the left is a 0.8 mm nozzle and has the same outer dimensions as all my previous nozzles, whether original with the printer or purchased afterwards. As you can see, the nozzles from this package have markedly larger "hexagonal pyramids", and my nozzle-change socket (6 mm) which was advertised for mk8 and has worked for all my previous mk8 nozzles is too small for these nozzles. Fortunately I have a socket wrench with a standard set of sockets, one of which works for these nozzles (8 mm for those of you using an old-fashioned, anthropomorphic decimal system, or 5/16 for those using a modern binary system of measurement). The oversize nozzles are also a bit large for the hot-end silicone sock; but that's more flexible and seems to work OK.With that out of the way, these nozzles worked as well as I could have hoped. I can only reiterate previous advice: *SLOW DOWN* your print speed. You've got a lot of filament to heat up and pump out through these nozzles. But the result is strong and functional. I especially like the results in "vase" mode.I also upped my print temperature for PLA to 200C but I didn't feel comfortable raising temperature for over 240C which is just in the middle of the "standard" range for PETG. I thought that might be a problem, as per the usual advice for large nozzles, but I was totally happy with the result. As they say, "your mileage may vary".I was torn between 4 and 5 stars for my review, but the oversize hexagonal pyramid in no way detracts from the final usage, and I can't find a clear definition of the "MK8" standard, if indeed there is one. So I'm going to give this 5 stars.

Huge nozzles allow for huge parts, real quick.These are some really huge nozzles.Believe it or not, the 2mm diameter nozzle worked with 1.75mm filament.If you do not have a large heater block, you may have to slow you print speed and raise your temperature on the hotend.On my CR-10, I had to set the hotend to 240 to achieve consistent extrusion.

Changed my life when I found the 2.0 nozzles they are amazing

Nice quality but a little high on the price

It did exactly what it was meant for. No BS in a nozzle.