Small and Lightweight. Measures 13 in. x 9 in. Weighs only 8 1/4 pounds. Generates No Heat. Perfect for Opal, Turquoise and other delicate stones. The spool is made from a phenolic resin, exclusive to the Graves machine, and will not warp, crack, or chip. It dopes not generate heat making it perfect for polishing softer gemstones.