712400602 Features: -Bi-directional flush joint runs smoothly in both directions.-Made with heavy-duty, extra weight cloth to resist tearing and stretching.-Durable resin system resists heat and humidity for longer life.-Made with aluminum oxide grain.-Used on wood, metal, fiberglass, plastic, painted surfaces.-60 grit.-2-1/2" x 14".-2 per card. Construction: -Porter-Cable sandpaper is designed to the highest quality to meet the need of today"s woodworker and construction professionals.