Quality assurance samples at the point of manufacture. Published August 8, 2013 at 1620 × 1080 in Quality assurance samples at the point of manufacture. ← Previous Next → A 200mm length of plastic extrusion is carefully cut and assessed to make ensure the gasket is made correctly. A length from every roll of extruded section is tested to ensure a quality product. Measurements are taken and information is recorded and stored so it can be tracked back to when and how it was made.