Feature: 1. Compatible with: Extruder heating kit specially designed for Prusa i3MK4 3D printer, effectively enhancing your 3D printing capabilities. 2. Fast Heating Speed: Upgraded extruder heating kit ensures rapid heating to the desired temperature during printing, which can improve your efficiency. 3. Easy Installation and Maintenance: Extruder heating block kit is easy to install and disassemble, facilitating maintenance and replacement. 4. Perfect Replacement: A superior alternative for damaged thermistors, extruder heating block replacement kit can be securely locked onto the board connector. 5. Excellent Aluminum: Constructed with durable aluminum, firm and sturdy, can be used for a long time, featuring a 24V 40W heating rod for reliable performance. Specification: Item Type: Extruder Heating Block for Prusa I3MK4 Material: Aluminum Heating Rod Voltage: 24V 40W Application: for Prusa i3 MK4 Nextruder Thermistor Cable Length: Approx 110mm / 4.33in Heating Rod Size: Approx. 145 x 6mm / 5.7 x 0.2in . Package List: 1 x Extruder Heating Block 1 x Extruder Thermistor Cable 1 x Heating Rod 3 x Screws