10 Pieces 3D Printer Silicone Sock 3D Printer hotend silicone cover Heater Block Cover Compatible with Creality CR-10, MK7/ 8/9, S4, S5, Anet A8, 3D Printer Hotend Extruder (Black)

I bought these to make sure my new heater block did not 'gunk up' with filament residue. It also provides some insulation as silicone has a low thermal conductivity, which means that it transfers heat at a low rate compared to other materials. So a good upgrade. Very happy. Especially at this price point.

I like these heat block covers, material does not stick to them and they insulate the heat block, also very easy to put on.

Great value, perfect fit for my Ender 3D Pro.

Abit of a tight fit on the ender 3 v2 it does the job but you have to ensure it sits properly first had 1 fall off during a print and cause a thermal run away other than that one issue those are perfect replacements for the price

Not a lot to be said - they do what they are intended for and are very cheap!

Buy tape it's much better. These don't fit well with heater and thermo wire. Tend to fall off once things get hot. Wish I hadn't wasted my money.

Loose fit and when they heat up they sometimes fall off, I found squeezing them onto the hot end works for a bit, but had to go back to normal silicone socks from creality.

Bad fit after been fitted and heated up deform and become lose then they sag down and block cooling part fan flow slighty advice = spend a bit more and get better quality