The tube body has a V-shaped inclination design, which is well designed, with a flat and smooth appearance, which fits the heating module of most brands of PCR instruments and has good thermal stability. The PCR tube cover is designed with a mirror surface, which has good light transmittance and fully considers optical factors to ensure the accuracy and reliability of experimental results. Both flat cover and convex cover are suitable for different PCR instruments. Good sealing, easy opening and closing, reducing finger wear. Strict optical and appearance testing ensures the consistency and stability of the product.