Suitable for MK7 MK8 original heating aluminum block.; The silicone cover sock can effectively keep the temperature of the heating block stable.; Material: silicone.; The silicone cover will keep your heater block clean and plastic of burnt, blackened and build-up, which can extend the life of the heater block and extruder.; help to keep the hotend temperature stable.

What's in the box
5 x 3D Printer Accessories