hi there,
i got ours from scrimcity, but i think the same ones are available on line at nfmwgc.
basically its just an extension pole that takes several different ends, one of those being a push fit for all unger products.
so i think it is an unger manufactured product.
primary reason for us getting ours, is that we have an overnight job next week, high level dusting on a pvc sheeting, so will be using a clamp and on then to hold rags, etc.
but have used them on windows and job done, we have an adavantage in that we have internal access to all our jobs aswell as external.
regards
martin