Ok international manufactures stdc tips for mx desoldering cartridges. Stdc cartridges are highly durable and designed for high heat transfer, making desoldering on multi-layer boards much easier. Desolder cartridges are available in three temperature ranges [600, 700, and 800 series]. A typical board usually requires a 700 series tip cartridge. The 600 series tip cartridge is used for thermally sensitive components or small single-sided boards. The 800 series tip cartridges is useful for tough components.
