Help Identifying Jet Body

Hi, I need help identifying the type of jet body that is installed in my hot tub. The jets are not performing as well as they should and I would like to see what my options for repair/replace are. The back of the Jet cover number is 216-1040, but I don’t know if they are suposed to go with the jet-body (they don’t snap on and at times they pop off)… I am not the original owner of the home.