The V4 Spare Parts Set is ideal for international customers and others who wish to maximize uptime by stocking spare parts, and includes:

• 1 - V4 Hot End with 0.35mm Brass Nozzle (.50mm Brass Nozzle for the Ultra One)
• 1 - Extra Thermistor
• 1 - Extra V4 Cartridge Heater
• 1 - 40 mm fan (24 V, 10 mm deep)

and

• 1 - Applicable Second Fan
• 1 - Applicable Filament Drive(s) 

M2 Spare Parts Sets Ordered Today Will Ship In About 2 weeks.