Achieve performance up to 20,584 x g with the Thermo Scientific™ Sorvall™ high performance aluminum cap for 1-liter centrifuge bottles, designed for superspeed and large capacity centrifuges. This high-strength aluminum cap enhances bottle support and improves chemical resistance to Phenol solutions when compared with Noryl™ plastic caps. These caps are available for both polypropylene copolymer (PPCO) bottles, designed for excellent chemical resistance and are autoclavable, or polycarbonate (PC) bottles, which are designed for excellent clarity.