This Mouthpiece Set from Storz & Bickel is intended for use with the Plenty Vaporizer. It is the replacement if your original mouthpiece is lost or broken. You can even use it as a spare to maintain cleanliness and hygiene when you share your vaporizer with others. The mouthpiece is made of durable, sturdy plastic, and is an Original Equipment Manufacturer (OEM) part designed for use with the Plenty. Each set comes with four pieces of Mouthpiece.