Are you sure on the 18mm? That's pretty large diameter. Most I have seen are 3/8-1/2"~
Ridgid has a ratcheting bender in 5/8 (358)and 3/4(368)(19mm).
They come up reasonable on eBay at times.
What's the bend radius required?
Wall thickness.
comes up as a PA horn
something corrupt in the link?
