<http://schema.org/description>
"JCD aft block is .75 in. thick HDPE. It has milled .325 in. x 1.75 in. slot through the center with soft rounded edges. Width is 2.75 in."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.apsltd.com/sonar-0-75-quot-aft-slotted-mast-block.html>