Bundle Includes: 2 x MakerBot PETG Specialty Filament Spool for Method 3D Printer (Red, 1.65lb) Keep It Dry: Make sure the built-in desiccant is in the spool to absorb any moisture exposure during the material loading process Storage Environment: Store in the included a vacuum-sealed metalized polyester bag to avoid moisture absorption from air; long-term exposure to humidity can compromise material quality and performance Specialty Material: This specialty material provides basic print performance and can require additional workflow steps to print successfully. PETG requires the application of adhesion stick to the build plate prior to printing Spool Type: Smart Spool provides valuable information including material type, color, and amount remaining via an RFID chip directly to MakerBot Print, while a desiccant in the spool maintains a low moisture level inside the drawer bay