Characteristic:Made of solid, durable aluminum.These heater blocks are CNC machined, with high precision and quality, and stable performance.Aluminum heating block working temperature: up to 280C degrees.Suitable for Makerbot MK7 MK8 extruder, for Creality 3/Ender 3 Pro, CR-10/CR-10S S4 S5 bender.Sp..