Easily and uniformly widen rainwater downpipes. Simply push to create sockets or sleeves on pipes of identical diameter for clean, leak-free connections. Flaring rollers with needle bearings in treated steel mounted on an aluminium block. Can be used on Ø 80 and 100 mm copper, zinc, stainless steel and aluminium pipes. NB: Not suitable for stapled pipes and tin-welded frustoconical pipes. These pipe expanders are available in the following versions (nominal diameter): DN 80 DN100 You are buying a professional pipe expander made of high-quality aluminium, brass and hardened steel.