Microhaematocrit Tubes with Mylar Coating. Wrapped with three layers of Mylar. Hemato-clad haematocrit tubes combine the precision of glass with the safety provided by a mylar overwrap. Accidental breakage is significantly reduced particularly when pressing into sealing clay. In the event of breakage, the Mylar wrapping will help contain the blood sample and provides an added layer of protection against cuts from broken glass. Handy dispensing vial with chrome lid. Available in Standard 75mm Microhaematocrit tube Blue or Heparin Coated 75mm Microhaematocrit tube Red. 200 tubes/vial.