BHS Validated desk Design (Black Scale) Square Aneroid (14.55 x 14.55 cm) with Latex-Free (Black) Velcro Adult Cuff , Latex-Free Coiled Tubing (10'), Spacious Basket on Reverse Side, Riester big ben® Generously dimensioned scale and high-contrast scale layout for optimum readability; scale up to 300 mm Hg Spacious basket on the reverse side for tubes and cuffs Latex bulb to inflate the cuff Non-wearing air-release valve with fine adjustment Micro-filter to protect the release valve and measurement system Specially hardened copper-beryllium membrane, which is resistant to aging, can withstand pressures of up to maximum 600 mm Hg Precision mechanism mounted on a special support, in order to ensure complete stability of the measuring system and the zero-point British Hypertension Society approved for accuracy