Replacement jet for a Hozelock sprayer, when you like me leave it out in the winter, and it gets destroyed by the frost.You might want to print the v2 file instead, it's beefier around the top, so it should hopefully last a bit longer. The thread can be tricky to print, so start out by printing the Threadtest STL, until the thread comes out nice. I had to go down to 0.1mm * 0.5mm layers, not to get stringing. Lube the inside where the o-ring is riding with Vaseline.