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5Pcs Aluminum Heater Block for MK7 / MK8 3D Printer NTC 3950 100K Thermistor 12V 40W 620 Ceramic - Walmart.com
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Amazon.com: 12V 40W 1/4-in (6.35mm) Ceramic Cartridge Heater for 3D Printer MK10 Extruder/Hotend : Industrial & Scientific
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