154505 - 4.0 mL, 15x45 mm clear screw-top vial. Ideal for your most demanding sampling needs. Recommended for pH-sensitive work and other highly critical applications. 312115 - 12 mm open-hole black polypropylene screw cap. 13-425 threads. Fits 4 mL, 15x45 mm screw-top vials.312515 - 12 mm red with a layer of PTFE/white silicone seals, total thickness 1.5 mm, for 13-425 thread screw caps. Packaged: 9-1/2 in. x 7-1/4 in. x 2 in. Box: Weight: 703.1 g.