What are these "thingy's" on the whizzer of the old goodmans ?

[King_Julian_S]

Hi wise men..

What are these 3 ring like thingies Goodmans put on their whizzer cones..
Maybe if someone can drop the pic here pretty please....

I noticed two if them are gone from my 201's and would like to know if j can just glue something similar in place...

http://instagram.com/p/gakf7BzbZQ/

 

[JimGore]

 

[d0dja]

 

[GECO]

 

[King_Julian_S]

 

[Waterhond]

 

[King_Julian_S]

 

[Ampdog]

 

[King_Julian_S]

 

[Ampdog]

 

[King_Julian_S]