MG Chemicals PLA Premium 3D printing filaments are manufactured under very strict quality controls to ensure consistant quality and a tight diameter tolerance accuracy. The new plastic spool is designed with a large hub to ensure a uniform winding of filament and cut outs on the sides to easily see how much filament is left. The PLA filament itself is made from high purity USA made PLA pellets that gives off a mild sweet smell when heated. PLA is an optimal choice for use in homes and schools. It does not require a heated print bed and easily adheres to masking tapes. MG Chemicals offers one of the largest selections of unique and vivid colors of 3D printer filaments in the market