The test tube measures 12 x 56 mm and features a 3 ml cylindrical flat bottom with a rim and graduated in polypropylene. The 21019 test tube measures 13 x 75 mm and features a 5 ml cylindrical rim and made of polypropylene. the 21013 test tube features 5 ml cylindrical rim and measures 12 x 86 mm is made of polypropylene. The other test tube sizes are 16x60 mm, 16x100 mm and Test tube 16x100 mm, all graduated in polypropylene.
