500 total tubes in sterile 25 count packs. The BD Falcon Round-Bottom Polystyrene Test Tubes with Cell Strainer Snap Cap are high-quality laboratory tubes designed for medical and biological applications. Made of durable polystyrene material and featuring a convenient cell strainer snap cap, these 5mL tubes are ideal for processing and storing samples in research and diagnostic settings. With a quantity of 500 tubes separated into 25 per pack and a reputable brand like Falcon, these test tubes ensure reliability and precision in laboratory experiments and procedures. Made in the United States, these tubes are a staple in many scientific and medical laboratories.