Weight: 23.00 lbs 【Material】These microtube storage box with lids are made of durable cardboard with waterproof coating and cardboard dividers；chemically resistant to alcohols and mild organic 【Temperature range】Stable from -196°C to 121°C 【Applications】These microtube storage boxes with lids are suitable for iquid nitrogen freezing (vapor phase) 【Capacity】holds 0.5, 1.5, 2.0mL Microtube, 2 inch box. 【Excellent Cusomer service】We are dedicated in providing the best products and services to customers. If you have any problem, please feel free to contact us. We will help you solve the problem as soon as possible.