GT2 Timing Belt is made of rubber, which has fiberglass reinforced, 6mm Width Timing Synchronous Belt For Fit for Reprap, Prusa, MendelMax 3D printer. Precise arc tooth profile to ensure accurate positioning and silent and efficient transmission.Wear-resistant nylon tooth surface, better protect tooth pitch and prolong service life. The glass fiber cord ensures the belt high strength, excellent flexibility and high tensile resistance.High-strength structure design, anti-extension, anti-jumping, make the transmission more stable. Suitable for 3D printer,dishwashers, packaging machinery, motorcycles, automobile, dryer, food machinery, inkjet printer, conveyor, bonders ect. The aluminum pulley has high quality shiny surface appearance and robust construction,constant speed ratio, no slip, high transmission efficiency, and greatly improve your work.