Abdos MaxiRCFT™ Trace Metal Free Centrifuge Tubes are specifically manufactured for sensitive analytical applications where the presence of trace metals can interfere with results. These high-performance tubes are made from high-purity, medical-grade polypropylene and are certified to have common trace metal and element levels below an ICP-MS detection level of one part per billion (<1 ppb). The thick, durable resin provides a high RCF rating of 20,000 xg and allows for storage down to -80°C. The tubes come with a pure, additive-free natural color cap, making them ideal for high-density gradient separations and other demanding experiments. Key Features & Benefits Trace Metal Free: Certified to contain less than 1 ppb of common trace metals, including Lead, Mercury, Zinc, Iron, and Copper, making them ideal for ICP-MS and other sensitive analyses. High Centrifugal Strength: Abdos MaxiRCFT™ technology delivers a high RCF rating of up to 20,000 xg. Excellent Performance: The tubes work excellently in high-density gradient separation of samples. Durable & Temperature Resistant: Made from a thick, medical-grade resin that withstands breakage and allows for frozen storage at -80°C. High-Purity Material: Manufactured using high-purity virgin USP Class VI Medical grade polypropylene, free from natural rubber and heavy metals. User-Friendly Design: Features a large white frosted area for easy writing and a leak-proof, natural color cap that is free of additives. Certified Pure & Sterile: Sterile versions are validated to an SAL of 10⁻⁶.