This is the 20mm length version of the C245773 cartridge which provides easier access to difficult-to-reach joints. High thermal cartridges are characterised by their optimized tip geometries which achieve thermal efficiencies of up to 40%. C245 Cartridges are appropriate for general soldering purposes and work with T245 Handpieces. JBC Long Life Tips offer instant heat up, excellent heat transfer and great durability. They last 5 times longer than other brands thanks to the JBC Most Efficient Soldering System and the Sleep & Hibernation features.