These leak-proof conical-bottom centrifuge tubes prevent breakage and leakage during high-speed centrifugation and are made of non-cytotoxic medical grade resin that allows users to easily see sample volume and color.

• Easy-to-read black graduations in ±2% increments
• Contains a large, white frosted writing area
• RNase-, DNase-, and endotoxin-free
• Autoclavable at 121 °C and freezable to –80 °C
• Sterile tubes are sterilized by irradiation
• During the freezing process, it is better to use plastic rack
• During high-speed centrifugation, it is better to use suitable rotor adapters

Caps are available in two styles. Flat caps are leak resistant and feature a molded-in elastomeric sealing ring that keeps the sealed tubes completely secure. These caps are ideal for vortexing chemicals and long rocker incubations. Plug caps feature a deep sealing area and offer a secure seal for extended storage.