Hinged Eppendorf Safe-Lock lid prevents unintentional lid opening during incubation and storage Polypropylene provides high resistance to chemicals, mechanical stress and temperature extremes Manufactured without the use of slip agents, plasticizers, and biocides – substances that have been shown to leach from plastic consumables into the sample and negatively affect bio-assay results g-Safe®: Depending on Safe-Lock Tube variant (see manual) exceptional centrifugation stability up to 30,000 × g prevents sample loss due to tube breakage and provides extra safety when working with hazardous samples Precise lid sealing for minimal evaporation rates during long-term storage Large frosted lid and surface on the side for easy labeling Ensured functionality from -86 °C to 100 °C Autoclavable when open (121 °C, 20 min) Available in lot-certified PCR clean, Eppendorf Forensic DNA Grade, and Biopur® quality for tested purity Available in Eppendorf Protein and DNA LoBind material for maximum recovery of valuable samples and in Amber for light-sensitive samples