Made of polypropylene Cap made of polyethylene The flexible sealing lip inside the cap ensures a positive leakproof seal under even the most adverse conditions. This deep internal lip fits snugly against the interior wall of the tube preventing the contents from coming in contact with the…

Made of polypropylene Cap made of polyethylene Similar to the T336 Series but without the "tethered cap" feature. This series of tubes is available either plain or with printed graduations and white marking area for sample identification. They have all the other fine features of…

Made of polypropylene This series of tubes is also available either plain or with printed graduations and white marking area for sample identification. O-ring seal screw caps are unattached but incorporate a flat top which provides a writing surface. These flat surfaced caps can be used with…