<http://schema.org/description>
"Replacement or spare magazine for your .40 S&amp;W Px4 Storm. 10 round capacity. Caliber: .40 S&amp;W. Finish: Black"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.berettausa.com/en-us/beretta-px4-magazine-40-sandw-10-rds/jm4px4010p/>