Acrylonitrile Butadiene Styrene (ABS) is an impact-resistant engineering thermoplastic. It is an amorphous polymer. It is made of three monomers: acrylonitrile, butadiene, and styrene. It is a preferred choice for structural applications due to its physical properties. These properties include high rigidity resistance to impact, abrasion, and strain. Used in electronic housings, auto parts, consumer products, pipe fittings, and Lego toys.