T8 Hand Laid Standard Flex SeatsThe fixed thickness of the injected T8 molding does enable small variations in rigidity but for professional drivers it is important to have the ability to make a wide variety of specifications. The flexibility from the handmade process of manufacture allows a complete range of T8 rigidity and weights to match the ones available in the other handmade shapes such as the T10 or T11. In the smaller sizes some have the letters "CD" after the size. This