Screw caps designed for secure sealing of 2.0mL CellPro™ microtubes provide reliable protection for laboratory samples during storage and handling. Each cap features a pre installed O ring that helps maintain a tight seal, minimizing evaporation and preventing leakage during routine laboratory procedures. These non sterile caps are manufactured from durable laboratory grade materials and are suitable for use in research environments requiring dependable microtube closure systems. The assorted color set (blue, green, orange, red, and yellow) allows for convenient sample identification and organization within racks or storage systems. Supplied in five individually colored bags of 200 caps each, the package provides a total of 1000 caps per case, supporting high volume laboratory workflows and efficient sample management.