ABS is a polymerized styrene comprised of acrylonitrile, butadiene and styrene. Acrylonitrile and styrene gives ABS rigidity and shiny surface. Polybutadiene gives it toughness and impact strength. Aside from these qualities, ABS performs a better flowability when melting and resists corrosion and abrasion as well. These qualities combined make it an ideal material for injection mold and extrusion. ABS is a recommended material for beginners by RepRap because of the loose temperature requirement during extrusion process. This material has been tested on RepRap, Makerbot, Mendel, Huxley UP! Printer, WeisTek, Thing-o-matic and Ultimaker. Note: This product is priced for 1 spool (including 1kg filament), and free shipping policy is NOT apply to the 3D Printer Filament. Features Loose temperature requirement Good flowalibity Easy to shape Specifications Print temperature: 220°C to 245°C First layer temperature: 235°C Print base material: Acrylic/ABS Diameter: 1.75mm