Brown ABS 3D printer filament.
The smaller diameter of a 1.75mm filament allows you to use smaller nozzles for printing. This in turn results in higher resolution prints.
With ABS filament you get a plastic that's tough, strong, durable and resistant to high ambient temperatures. This makes it the ideal filament for printing objects that you expect to take a fair amount of punishment.
ABS remains flexible after printing so you can continue to work on it with relative ease.
Printing items designed for regular use, rather than aesthetic value, is the ideal use for an ABS filament like this since ABS is not well-suited to printing sharp edges or intricate details.