The Makerbot PLA Filament is a great, easy to use bioplastic material that adheres well to acrylic and MakerBot Build Plate Tape for consistent prints. PLA Filament Features Compatibility: MakerBot Replicator 2, Replicator, Replicator Mini and Replicator Z18 Diameter: 15cm Filament Diameter: 1.75mm - 1.8mm The MakerBot PLA Filament is constructed of a bioplastic derived from corn and is guaranteed not to have any BPA, phthalates, or heavy metals. This filament should be stored in a cool, dry place, as it can absorb moisture, and long-term exposure to humidity can compromise the filament's quality and performance.