ABS

Strong, durable stuff. The stuff Lego is made from. Pitty it doesn't print as well as well as the biodegradable PLA we always use. Hard to explain why especially when PLA only has a shelf life of two years or so before it starts to go brittle and becomes unprintable. I guess it is because ABS is a polymer that is best used for injection moulding (Lego). Who knows. Might need to tweek the printer a bit....