Hygenic Natural Rubber Tubing Box 10928 by Hygenic GROUP: Lab Equipment & Accessories:Hematology:Controls/Calibrators Item Description: Translucent Black Tubing, 5/16"-ID x 1/16"-Wall x 7/16"-OD, 50 ft/Box Packaging Desc: Tubing Rubber Blk5/16X1/16X7/16 50Ft/Box Country of Origin: Harmonized Tariff Code: Product Description: Made of natural rubber; seamless, flexible and smooth. Excellent tensile strength. Packaged on reels or coiled in boxes as indicated.