I am very happy with the quality of this brush which I bought from Saras Vac Shack. The horsehair bristles are twice as thick as the bristles on the dusting brush for the GE Swivel-Top Canister (purchased in 1964!). The flexible rubber part is also thick and durable. A few bristles fell out, but that's all I encountered. I give this brush 5 stars despite the PERSONAL issue I had with it. After all, it's NOT the fault of the brush or how it's advertised. My hands are a bit crippled from Rheumatoid Arthritis and I've lost about 50% of my "grip" so I don't have the strength or grip to put this brush on my GE vacuum. But I CAN easily put it on top of my Upright Red Devil vacuum, which is great because the dusting brush on this machine also fits a dust box. This dusting brush sits squarely on the Red Devil wand, staying in place while I clean and not too difficult to remove from the wand. So if you have the same physical limitations I thought I'd let you know what I found. As far as I can measure, this brush is the right size - the problem is in my HANDS! (And yes, I have a lot of trouble getting the GE replacement brush off my wand because of the button on the wand and the notch on the brush. Oh well.) Happy cleaning!