... thickness11- 21mm. customized idea welcome !l Sound could be any animal sounds,traffic sound effects,music,voice or any sound effects.l ... thickness11- 21mm. customized idea welcome !l Sound could be any animal sounds,traffic sound effects,music,voice or any sound effects.l ... - 21mm. customized idea welcome !l Sound could be any animal sounds,traffic sound effects,music,voice or any sound effects.l ...