This red-colored 20-415 HDPE continuous-thread lined closure is composed of high-density polyethylene (HDPE) and made for Nalgene® continuous-thread PETG serum vials. This closure has a three-ply co-extruded liner, with a low-density polyethylene (LDPE) core between two facings of solid HDPE that eliminates the need for a rubber stopper. It is leakproof, and sterile to a 10-6 Sterility Assurance Level (SAL). Vial sold separately. Material: High-Density Polyethylene. Liner: Three Ply Co-Extruded HDPE/LDPE/HDPE. Neck Style: Continuous Thread. Height: 14.2mm. Outer Diameter: 22.1mm. Neck Finish: 20-415. Nominal Weight: 1.4g. Color: Red. Nalgene® #: 342158-0025.