The guide below will help you determine which Hot-End generation (version) is installed in your Leapfrog Xeed 3D printer.
Leapfrog Xeed Hot End - Generation 1
Connector color thermistor: White or black
Nozzle: 0.35mm brass
Filament size: 1.75mm
Heatbreak: PTFE liner
Temperature sensor: NTC Thermistor - EPCOS 100k (4.7k pullup)
Max. recommended temperature: 250 ℃
Heatercartridge: 40W 24V [⌀7mm x 21.5mm)