The high quality bananabells of Steel Roseline are super combinable, whether with simple balls or sparkling Sealed Multi Jeweled Balls  By the way, all the threads in our jewellery collections are standardized, so you can combine the rings, balls, rods and attachments with each other! The bananabells are available in thickness 1.2 mm externally threaded. 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.