Cryogenic Vials Cryogenic Vials store valuable samples such as cell,serum and antibody safely. FEATURES CAP TYPE: Outer cap type and inner cap type (Slim Tubes are only outer cap type) CAP COLOR: White VOLUMES: .5mL, 1mL, 1.2mL, 1.5mL, 2mL, 4mL, 5mL Rounded bottom and self-standing bottoms. Excellent air-tightness The cap contains silicone packing inside, which brings about excellent air-tightness and prevents dryness and liquid spill. Easy pipette operation The diameter of vial mouth is large, making pipette operation easy.