| http://www.w3.org/ns/prov#value | - Valve body 1438 is made from flexible, stretchable, elastic or resilient material, such as silicone or rubber, and is provided with one or more than one slit 1455 extending longitudinally therealong allowing instrument of various sizes to be inserted through the lumen of the valve body with the valve body conforming to the size of the instruments to produce a seal therewith.
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