The stems come with a wooden but to so swapping them out is a pice of cake, you need to break the lacquer seal on the button of your Wasp when you get it so you can clean the Calabash chamber, don't forget to cleanly any sawdust residue in the bowl and chamber and ensure the internal draft is clean, often a segment of wood is left on the top and a smokers knife should pop it free. Enjoy those babies.
banjo