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Continue to Chat0.5ml cryogenic vials with O-ring caps; self-standing; Polypropylene; Brown and non-transparent; Working Temperature from -86 C to 121 C; Sterile; DNase & RNase free; 50 Tubes per Bag; 10 Bags per Pack; 4 Packs per Case https://www.7bioscience.com/shop/detail/p/0-5ml-cryogenic-vials-with-o-ring-caps-self-standing-polypropylene-brown-and-non-transparent-working-temperature-from-86-c-to-121-c-sterile-dnase-rnase-free-50-tubes-bag-10-bags-pack-4-packs-case/BLX-81-7055