“2 in 1”. Tandem series has been created with the idea of offering the smoker a unique, multifunctional object. The two included tapered stems will allow you to use the same pipe in different situations. For your relaxing evenings we warmly suggest you to use the long acrylic tapered stem which can give you a fresh and pleasant smoke. The standard acrylic tapered stem is for any occasion. Being Tandem a pipe with a 3mm hole, it cannot have a filter inside.