<http://schema.org/description>
"Attach these wide, brightly colored plastic stopper balls at the ends of control lines for an improved grip, or on halyards and other lines for protect shackles. Also works great for preventing lines from going too far into a mast sheave.\r\nThese balls can be manually drilled to accommodate larger line diameters. The bright colors aid in identifying lines and are available in black, white, yellow, blue, red and green."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.apsltd.com/stopper-ball-1-3-4-green-3-8-quot-id.html>