Feature:1. [Enhance Printing Performance] This hotend heater block kit is designed for Prusa MK4 3D printer, can elevate your 3D printing capabilities.2. [Rapid Heating] This aluminum heater block kit allows for quickly achieving the desired temperature during the printing process, enhancing printing efficiency.3. [Reliable Replacement] Our thermistor is an ideal replacement for damaged thermistors, can be securely connected to the circuit board connector.4. [Anti Interference] This kit has excellent anti interference performance, ensuring stability and reliability, resulting in consistent performance.5. [Ideal Replacement Part] Replace old or damaged components with this heater block kit, finely crafted and attention to detail.Specification:Item Type: Hotend Heater Block KitMaterial: Aluminum AlloyHeating Rod: Approx. 6x12mm / 0.24x0.47in, 24V 40W, Cable Length: Approx. 120mm / 4.72inThermistor: Approx. 3x8mm / 0.12x0.31inAluminum Heating Block Size: Approx. 21x13x13mm / 0.83x0.51x0.51inApplicable: for Prusa MK4.Package List:1 x Heating Rod1 x Thermistor1 x Aluminum Heating Block1 x Insulation Sleeve