HALYARD PUREZERO BLACK Nitrile Exam Gloves are tested for use against 15 chemotherapy drugs and 45 chemicals. CASE of 1000 Small Halyard PureZero 5.1 MIL – Black Nitrile Exam Gloves LFS711SM. PUREZERO BLACK gloves have a SMARTPULL Dispenser, which incorporates two separate openings on the box.