3Pcs MK7/MK8 Heating Aluminum Block For 3D PrinterFeature:Size: 20 x 20 x 10mmMaterial: AluminumWeight: 6gHose and nozzle mounting holes: M6Heating rod mounting hole diameter: 6mmScrew hole: M3Thermocouple mounting holes: M3Screws: M3, six angles innerPackage included:3 x Heating aluminum block