McKesson Tube Closure Polyethylene Snap Cap Red 12 mm / 13 mm / 16 mm (Universal) Fits Most 12mm, 13mm and 16mm Evacuated Glass Blood Collection Tubes and Plastic Test Tubes NonSterile (1082095_BG) 1000/BGIdeal for recapping most 12, 13 and 16 millimeter evacuated glass blood collection tubes Designed for easy on and easy off use, featuring double thumb tabs Flexible closures protect from aerosols of highly infectious microorganisms. Guard samples against cross contamination and laboratory work areas against infection and spillage Precision molded, low density polyethylene (LDPE) designed to fit firmly on the tube Closures remain sturdy under most