The ''Profile 88'' beak profile gradient is more gentle than the traditional design, so allows the player greater flexibility of movement and position, and therefore enhanced comfort and articulation. B40 Model. Tip opening: 119.5 (1/100ths mm), Facing: Medium Long, Characteristics: The same facing as the B45 but with a wider tip rail. Produces a compact, centered sound and enhanced by the acoustic qualities of HD ebonite.