Channels & Blades

Can someone 'splain this old man why Ettore blades will not go into Pullex channels?

Are these things not really meant to “mix-n-match”?

I own only one Pulex channel, and I use it in an Ettore handle and I use Ettore rubber in it. I t is a brass channel. Not sure why your having an issue…

Ive found that ettore rubber has the largest bead that I have seen in my 5 years cleaning windows. the only other channels they seem to fit is unger and steccone.