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Copper heating block Features Wear resistant High temperature resistant 1.Overall high temperature resistance up to 550℃. 2.Sturdy and hard-wearing texture, smooth and fine surface. 3.Made of special high-temperature copper alloy, the softening point is much higher than 500C, and the thermal conductivity is greatly increased. These copper blocks are very suitable for high-temperature applications at work. Nozzle size:1.75/0.4mm Package cinlude :1pcs