Manufacturer: Chemglass Life Sciences CLS11500500. Square Bottle, Media, 500mL, Sterile, PETG, Graduated, 38-430 (Not Assembled). • Pyrogen, DNase, RNase & Particle-Free• Transparent & Optically Clear• Freezable at -20°C• Disposable/Recyclable• Gamma Irradiated• Sterility Assurance Level (SAL) 10-6• 20% Overhead Space• Inside Neck Diameter: 34.5mm• Vented Cap AvailableBreak-resistant & durable Media bottles are manufactured from polyethylene terephthalate copolyester (PETG