Screw caps without O-ring for sample tubes

These tubes and caps are designed for the storage and transport of biological material. They are manufactured from non-toxic polypropylene and provide both strength and clarity. The vial features an external thread, which provides a smooth and uniform interior surface and reduces the risk of contamination.

The screw caps are also made of polypropylene, giving them the same expansion coefficient as the tubes. This, combined with a polypropylene inner ring, ensures a leak-proof seal even with temperature fluctuations. The caps feature a long skirt and a super-speed thread design, allowing them to be opened or closed with one turn.

The caps are available with or without a silicone O-ring and come in various colors. Screw caps are sold separately.