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Ruby Quartz Heating Tube Short Wave IR 1000W Solder Paste Drying. This heating tube converts more than 90% electric energy into penetrating infrared heat to greatly cut down overall factory power consumption every month. No volatile harmful substances will be released when the tube works, so it keeps heated workpieces clean and meets strict industrial environmental standards. Ruby quartz heating tubes finish full temperature rise within three seconds so production lines can start heating work without long waiting periods.