I found these to be great looking and great fitting. The tape on the back is 3M tape. I activated the tape by rubbing it with a screwdriver handle before removing the backing. Held each in place for 30 seconds. Adherence is good with no separation from speaker. Looks great!

Raiting Update - So far, so good. The silicone and painter's tape is working, the things are laying flat. I guess they should sell and Accessory Pack to go with the chrome. The finish on mine were typically good for this kind of stuff. Let's see how the glue job lasts through August in Arkansas. Don't even think about simply using the supplied tape.

Pretty much agreed innkeeper. Outline fit pretty good; bend of piece was nowhere near the same as the bend in the speaker grill. Tried silicone and painter's tape. I'll let you know in 3-4 days if it works. If not, I guess I'll be taking a needle to clean up the speaker grill.

The finish on this piece is the poorest i've seen. typical of this mfg. The fit is extremely poor. I had them on the trike for a day then ripped them off (before they fell off) and trashed them. Very poor product dont waste your $$$$.