Polymaker ABS Pro 3D Printer Filament, Grey 1kg Engineering Grade ABS with High Heat Resistance, Durable, Tough, for Functional Parts, Printer Components & Prototypes

The most engineering-minded consumer brand in this space. Polylite is their everyday PLA, PolyMax adds impact resistance, and PolyWood nails the timber look. They publish data sheets and actually explain what's in their formulations.