The high quality bananabells of Steel Roseline are super combinable, whether with simple balls or sparkling Sealed Multi Jeweled Balls. For attachments look in the Attachments & Balls section threading 1.6mm.
 
The bananabells are available in thickness 1.6 mm externally threaded and length 10.0mm. All basics of Steel Roseline can be sterilized in an autoclave and because of the skin-friendliness of the material it is also harmless for allergic.