Official Creality Ender 3 s1 Heater Silicone Sock, Heater Block Silicone Cover for Creality Ender 3 S1/Ender3 S1 Pro/CR10 Smart Pro/Sermoon V1/Sermoon V1 Pro 3D Printer (Pack of 5)

Overall these seem to work well at insulating my 3D printer hotend. I was having issues getting my hotend to heat up to the temperature I wanted, but one I installed one of these it was able to heat up to my desired temp and then a little more. Pros: - Solid quality - Good insulation - Easy to use Cons: - One that came in the pack was miss shapen a bit, nothing major that really affected function

The stock cover got stuck and melted in the extruder. This is a 1 to 1 perfect replacement.

dont say it works for an ender 3 pro when it doesnt

I had no issues installing a new boot on my CR-10V3, It slid right on!

Works well on Ender 3, hot end

Ive had my printer nearly a year and the original silicon cover was getting kinda gross. These are a perfect replacement.

I was a bit skeptical at first, other customer photos looked different than the listing, and some review claimed there was a part that needed to be cutout. NOT THE CASE! While these looked slightly different than the listing photo, they have a smaller nozzle hole, they do fit more tightly around the nozzle and cover a bigger part of it, with just the tip poking out, BUT... I am pretty sure that is on purpose, Creality must have updated their design. These do have the Cr embossed on the side, and are made of nice GOOD silicon material. Also if still in doubt, I can confirm that i just received and Ender 3 Pro (July 2020) ordered from Creality and it came pre installed with a sock that is identical to these ones instead of the traditional wrap. For any MK8 Hot end, I can confirm these are the real deal!

For well for my ender 3.

This replacement did the trick. Worked perfectly. Was easy to install, just slipped it on. Somehow my original cover tore and would not stay on.

Exactly what I needed my block cover ripped while I was cleaning the nozzle for my CR-10 V2 these worked great for replacements. Easy install A little on the looser side but they work.