Abrasion, chemical (chlorine and peroxide), and moisture resistant, the Velcro® cuff is constructed of high-molecular polymer 210 denier nylon. Sized to meet American Heart Association recommendations, the artery indicator label and index range further ensure proper cuffing for correct arterial compression.The double tube seamless inflation bag is constructed of crack-resistant, non-sticking, high-density hypoallergenic latex-free PVC. The universal double tubes enable compatible cuff exchange with all MDF® and other major brands of blood pressure systems with double tube configuration. Swedish SPRI sizes are also available. Compatibility MDF® 800, MDF® 808B, MDF® 808M, MDF® 830 & MDF® 840, MDF® 848AR, MDF® 848IC, MDF® 848XPD, and most other major brands of blood pressure systems (Luer lock connector not included). Blood Pressure Cuff Sizing Matters Using the wrong patient blood pressure cuff size will likely yield an incorrect blood pressure reading. MDF Instruments offers the following cuff sizes to ensure blood pressure reading accuracy (largest to smallest). Upper Arm Circumference Ranges by Cuff Size: Thigh: 40CM - 65CM (thigh or upper arm) Thigh with D-Ring: 42CM - 55CM Large Adult: 33.5CM - 50CM Large Adult with D-Ring: 36CM - 48CM Adult: 25CM - 40CM Adult with D-Ring: 28CM - 37CM Pediatric: 19CM - 27.5CM Infant: 14CM - 19.5CM Newborn: 10CM - 15CM US Neurologicals is an official MDF dealer. This item is dropshipped (in stock) and may take additional time to ship.