Imdinnogo BCZAMD Heatbed Silicone Leveling Column, 3D Printer Hot Bed Mounts Column Stable Tool Heat-Resistant Silicone Buffer for Prusa i3 Plus A8 Wanhao D9 Mega, 4 Pack Brown

These are fantastic. I don’t have to level my bed anymore. On the ender 3 pro the back left is a bit too big. This company is fantastic. They sent me a gift that cost more than my purchase. The gift did not influence this review. They are spacers not much to say other than they work great.

Inconsistent height and diameters. Returning

With the OEM spring things under the bed of my Anycubic Mega S, I had the level the bed with pretty much every print I did. These little fellas install easily and keep the screw from moving, so I rarely have to level the bed. Maybe once every 15-20 prints or so just to make sure things are still in good shape. They are inexpensive, look sharp and work well.

I have had the yellow springs and these are much nicer. They stiffen up the bed and it seems to not need adjustments as much.

Got these to replace my original bed springs. Now I spend much less time leveling my bed. Once you get level, you wont need to re-adjust for quite a while. Really Glad I bought these.

Great replacement for bed springs. Feels durable.

while they do function the 16mm height was just not enough for my CR-10s. even after adjusting the zstop limit switch the wheels were too loose to level properly. I ended up having to use 4-5 washers to shim the bed up. after the workaround it has been printing great not noticing any bed level issues after many prints. If you have a cr-10 I would recommend columns 20+mm

I havent needed to level my bed (ender 5 plus) in over a month with these installed, only slight adjustments upon printing. The bed screws seem to keep their position well. A must have for 3d printers!

It was good while it lasted. Had it since Aug 2020. It lost it shape a bit.

Once I leveled my bed with these, it stays no more adjusting.