Feature: 1. Enhanced Printing Performance: Specifically designed for Prusa i3 MK4 24V 40W 3D printers, this heating block kit with 24V 40W heating rod and block boosts your printing capabilities, a must have accessory for your 3D printer. 2. Efficient Heat Transfer: This heating block kit quickly reaches the desired temperature during printing, enhancing printing efficiency and ensuring smoothly performance throughout the printing process. 3. Excellent Interference Resistant: With a long lifespan and outstanding interference resistant, this kit provides stability and reliability, delivering consistent performance for your 3D printing needs. 4. Improved Work Efficiency: Upgrade your 3D printer with this heating block kit, offering superior performance, durability, and attention to detail to help you achieve optimal work efficiency. 5. Ideal Replacement: An excellent alternative for damaged thermistors, easily lockable onto the circuit board connector. This finely crafted kit pays attention to detail and serves as a great replacement for old or malfunctioning parts. Specification: Item Type: Heating Rod Thermistor Wire Kit Material: Copper Plating Heating Rod: Approx. 6 x 12mm / 0.24 x 0.47in 24V40W Wire Length 120mm / 4.72in Thermistor: Approx. 3 x 8mm / 0.12 x 0.31in Copper Plated Heating Block Size: Approx. 21 x 13 x 13mm / 0.83 x 0.51 x 0.51in . Package List: 1 x Heating Rod 1 x Thermistor 1 x Copper Plated Heating Block 1 x Insulation Sleeve 3 x Accessories