Easier Nozzle Height Calibration Twin pack - 2 LokBuild Build surfaces included! Improves model adhesion, reduces warping, and is durable and long Lasting One Build Surface for most materials: ABS, PLA, HIPS, PET, Woodfill, Bronzefill, Copperfill, Brassfill and many more brands Made from heat-resistant materials to provide a stable build platform for 3D printed models whilst allowing completed models to be removed easily