Bronze Pocket Top Precision Spinning Desk Toy for a Hand Made High End Collection CNC Machined from a solid piece of Spinning Bronze and Stainless stem, Si3N4 Silicon Nitride Ceramic Tip Grade 5 is 4 times smoother than Ruby Tiped tops Our Pocket Tops are meticulously checked to ensure perfectly balanced spinning Desk Toy Collectible spintop peace of jewelry for adults, 1 3/8 inch Diameter x 2 inchs tall Perfect Custom gift, designed to last and spin forever on your spin station Hand Made and Polished and Includes a felt Carrying Bag we have gotten spin times of 11 minutes and some customer reports of even higher