5ml polypropylene screw cap external thread self standing star base cryovial sterile rnase dnase free

Premium quality sterile polypropylene cryogenic storage vials with leak-proof sealing external thread cap for protecting valuable laboratory and patient samples. The self-standing "star-base" makes hands-free opening and closing a breeze when the tubes are placed in a cryogenic tube rack. Certified to be RNase/DNase and human pyrogen free and safe to be stored at temperatures nearing -196C. No cryogenic manufacturer recommends using their cryovials in the liquid phase of LN2 out of an abundance of caution. Our 5mL Cryovials are graduated up to 4.4mL for easy reading and feature a white space for making notations Sold by the case of 500 vials and packed in 5 inner bags of 100 cryovials. Bags have a re-sealable ziploc top to help maintain sterility.