Transporter Microbiology Collection Double-Tip Swab Cultures, 50/BoxDouble tipped specimen collection and transport device. Healthlink Transporter Microbiology Collection liquid stuart double tip aerobic culture swabs. Easy to use specimen collection system; simply peel open the sterile package and remove the swab. Collect the sample and insert the swab into the tube of medium. This action places the tip of the swab in direct contact with the culture media which, in turn, keeps the organisms viable during transport.