Bayani: Torwell ASA (Acrylonitirle Styrene Acrylate) polymer ce mai juriya, sanannen yanayi.ASA kyakkyawan zaɓi ne don bugu samarwa ko sassan samfuri wanda ke da ƙarancin matte mai ƙyalƙyali wanda ya sa ya zama cikakkiyar filament don kwafin fasaha.Wannan abu ya fi ɗorewa fiye da ABS, yana da ƙananan sheki, kuma yana da ƙarin fa'ida na kasancewa UV-stable don aikace-aikacen waje / waje.