3Dman 4PCS 40mm Hand Twist Leveling Nut Diameter + 4PCS Hot Bed Spring Compression+ 4PCS M4X40mm Screws for 3D Printers（4 Set）

A lot better than it ones that came with my anet a8 plus. The only thing that would have been better, is if they had marked the up & arrow indentation in a different colour. But it only took me a couple of minutes of my time to fill them in myself.

So these are ok if you have the clearance height available... I didn't and had to improvise the thread studs instead of the large wheel supplied, I use the bed mesh leveling so once set they do not need adjustment. As I am still upgrading the Anet A8 with the new V6 head I plan to add in the Z stop probe so that it auto levels on every print. I was very surprised with the quality of the springs and are the best replacement I could get so well done there. I would however change the wheel size so that it clears the lower rails.... maybe 10mm off the diameter.

I put these on my printer before i realised that the knobs were too big and hit my frame :(However, the item feels secure and solid as well as nice and easy to use once installed. Pretty sad i didn't measure before ordering but i got other knobs so i could use the sprints and nuts so not a complete loss.Can't fault the product though.I've recently moved to silicon posts so it'd be interesting to see how they compare to these springs.

I bought the regular Ender 3 non X, non pro variant. My machine came with a thin fibre board which creality dress with a surface. With the default mat and springs I could not level the bed at all. A hump in the middle of the bed made it impossible, so I plumped for a glass bed and these yellow springs.Finally I could level the bed up and the filament would adhere to the bed.The default silver springs I pulled out of the machine were all different heights/lengths. I understand the spring at the rear left corner needs to be shorter on account of the spring sitting in the heater cable gland, but all were different.

I used these to upgrade from the button sized wheels that originally came with my printer. Due to the size of my fat fingers these wheels have made it a lot easier to adjust my bed.

After struggling to get prints to work and adhere properly on my "stock" CR-20 pro - I read suggestions on several forums that adding a manual bed levelling kit would really help. Shipped quickly and worked well on my printer. I removed the metal top plate and then cut out (with a stanley knife/box cutter) the magnetic covering in the four positions to allow me to remove the fixing bolts. Fitting the kit was then easy. Following installation and a standard bed-levelling procedure, my prints are much better and the Auto-Bed Levelling kit handles any small issues. Very happy with the product.

As described arrived on time. .

3 of the springs very simple to replace, one was a little trickier. I only used the springs as I preferred the original knobs as they were much larger than the new ones and I feel give more accuracy when setting the table. These springs have made a massive improvement to my bed levelling.