Piezos, such as PVDF, can potentially be fabricated as rods instead of strips, although piezoelectric films are typically more common. The discussion highlights that while strips are widely available, the flexibility of the material is crucial for applications requiring bending. Quartz rods are considered too stiff for this purpose, necessitating the use of materials with lower modulus. The need for flexibility in piezoelectric applications is emphasized, indicating that plastic materials may be more suitable. Overall, the conversation revolves around the feasibility and material properties required for rod fabrication of piezoelectric devices.