Blom-Singer® Tracheostoma Valve Housings – The Tracheostoma Valve Housing is a reusable, flexible housing that attaches the ATSV II, HME cartridge or Shower Guard over the stoma. It is applied with separate adhesive tape discs and silicone adhesive. It is available in two sizes, standard and large. It is also offered in two different materials, standard and PVC.