4 Pack USB Brushless Cooling Fan 40mm Fan High Performance DC 5V Cooling Fan Speed 4200 RPM Fan for Small Appliances Series ReplacementUsed in humidifier aromatherapy and other small appliances series small heat radiating communication equipment military equipment intelligent industrial control equipment plate cooling heat, high precision medical e..

Umlife 4Pcs 3D Printer Cooling Fan 40Mmx40Mmx10Mm Oil Bearing Blower Fan Dc 12V Brushless Cooling Fan With 2 Pin Terminal For Hotend Extruder Heatsinks Makerbot Mk7 Mk8 Cpu Chip (12V 0.08A)This helps to prevent the heat from the nozzle traveling too far upwards. Without this fan, the filament could get soft above the heater block, which leads to ex..

UMLIFE 10PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply ModuleLM2596HV AcDc to Dc Buck converter Module 3v 33V 5V 6V 9V 12V 15V 24V Dc 5V-50V Adjustable Step-Down 3A LM2596 Power Supply Features:   A:  The power module adopts the plug-in LM..