Application: A low expansion spcial glass material, corrosion resistance, high tempratride resistance, closure, durability, transparency and chemical stability. Widely used in vgtal matriel culture, microbial culture and animal cell fixation. Optional size: 90 mm optional. Each item includes 5 Ptri bots of mrs. size. The suprieur hood acts as a dust cover. The infrieure boot is flat, the suprieur lid adapts and the finish is neat, flat and smooth. Why choose us: unlike disposable plastic Ptri boots that can only withstand a maximum temprature of 80C, Huanyu glass Ptri boots have a temprature rsistance plus leve of 400C. Better rsistance corrosion more chemicals. For laboratory staff, they are easier to clean and handle. They can be rutiliss several times, more cological and more economical. Packaging method: Huanyus packaging department has accumulated a worldwide sales experience, taking into account in depth the gographic and transport factors, and has formed its own unique and professional packaging method. Before packaging, our staff screws up scratches, burrs and manufacturing defects. It removes the residual items and only selects items of better quality. Our exclusive packaging method helps minimize damage during transport.