This pack of 10 of 500g PLA filament is easy to use, nontoxic, odorless, and biodegradable. It's the versatile choice that's perfect for making a wide range of durable 3D prints in the classroom with your Robo 3D printers. Pack comes with 1 black, 1 gray, 1 white, 1 red, 1 blue, 1 yellow, 1 orange, 1 pink, 1 purple, 1 green 500G Spools. (Compatible with any open source 3D Printer).