3 Pack Silicone 3D Printer Sock For Prusa MK4 & XL Nextruder 

FYSETC Prusa 3D Printer Accessory

MK4 Heater Block Silicone Sock

Easy to Install Hotend Part

Protect the Hot End Nozzle

Insulating Silicone Cover

High Temperature Resistance

Compatible with Prusa MK4 XL

1 - Pack of 3 Black Silicone Socks