Not having a ton of experience with hair diffuser attachments, I didn't realize that the sizing wasn't standard. This piece fit my daughter's regular off the shelf hair dryer, but it's gigantic size diffuses the air to the point where it doesn't seem all that effective.

Lesson learned: pay attention to the sizing, and know that not all diffusers are the same, despite the pictures indicating that they are.

Segbeauty Diffuser for Hair Dryer, Hair Diffuser for Curly Wavy Hair Fitting Most Blow Dryer Professional Salon Frizz-free Diffuser Attachment for Blower with 1.57"-1.97" Nozzle

Did a good job diffusing, but it was soooo clunky on the end of my blow dryer. Made it impossible to set down the dryer without laying taking up the entire counter or falling off. I ended up returning it (I had no issues returning it though so that was good)

I had just purchased this item after hearing about it for months. Today was the day I could finally test it. I opened up the box “very exited” and to my surprise heard a rattling. Upon closer inspection it seemed that the plastic numbs sticking out were missing. not just one but 2 were Broken. Safe to say it’s probably light weight for a reason.