VTP Nasopharyngeal Collection and Transport System Sterile (1198591_BX) 100/BXTube body and cap are polypropylene, with no deformation after high temperature, high pressure (121 C, 15 minutes) and no embrittlement under low temperature ( 196 C). Tube can tolerate static extrusion and dynamic impact. Leakproof, the tapered bottom design helps withstand centrifugation. Flocked swab is made with an innovative jet embedding nylon technology; the nylon is adhered vertically and uniformly on the surface of swab tip, improving the