<http://schema.org/description>
"With silver colour dial. Showing % relative humidity.\n\nSize of frame 60mm x 40mm.\nCan be used individually or with Barometer between them.\n\nDiameter of Drum 45mm. Depth of recesses required 20mm.\n\nWhile stocks last."^^<http://www.w3.org/2001/XMLSchema#string>
<http://hobby.uk.com/drum-hygrometer-45mm-dia.html>