This 30mL (1oz) natural high-density polyethylene (HDPE) narrow-mouth packaging bottle comes with a polypropylene closure. It has a tough plastic construction and is made from high-purity, food-grade resins with no plasticizers, fillers, or extenders. The HDPE is injection blow molded for uniform wall thickness and strength. This bottle is guaranteed leakproof, making it excellent for storage, shipping, and packaging of liquids. Ideal for specialty chemicals, diagnostics, biologicals, reagents, adhesives, and veterinary pharmaceuticals. Manufactured in compliance with ISO 13485:2003 quality requirements. Bottles and closures are bulk packed in separate polybags within the same carton. Bulk Packed. Leakproof. Bottle Material: Natural High Density Polyethylene (HDPE). Neck Type: Narrow Mouth. Closure Material: Polypropylene. Height With Closure: 61mm. Outer Diameter: 34mm. Neck Inner Diameter: 14mm. Closure Size: 20mm. Neck Finish: 20-415. Capacity: 30mL (1oz). Nalgene® #: 312089-0001.