12″ × 12″ Grade A 0-Ledge 4″ Thickness – Granite Surface Plate
•Crystal Pink Granite Surface Plates •Grade A – Inspection Grade: This is typically specified for general work in quality control. • Unilateral Flatness Tolerance Overall flatness tolerance is based on unilateral measurement. • All points on the work surface shall be contained between two parallel planes separated at a distance no greater than the amount specified for each particular grade and size. •Meets or exceeds U.S. Federal Specification GGG-P-463C for flatness •Smooth, jewel-like quartz bearing points protect accuracy and finish of both the surface and the tools used on it.