Sachs 50 / 80S Exhaust System in Chrome. Fits: Sachs 50 / 80S, GS 5 / 6 speed. Suitable for Sachs, KTM, Hercules. Not suitable for Puch models. Internal Flame Pipe Diameter: 29 mmExhaust Flange Mounting Hole Distance: 50 mm A quality product, manufactured in Portugal.