DESC: The universal Single Tube enables compatible cuff exchange with all MDF and other major branded blood pressure systems with double tube configuration Constructed of high-molecular polymer 210 Denier Nylon which is abrasion, chemical (chlorine and peroxide), and moisture resistant The D-Ring feature is specifically designed to enable self-administering users to easily attain correct cuffing and arterial compression The Inflation Bag is constructed of crack & stick-resistant, high-density hypoallergenic latex-free PVC 100% Latex Free