HYPER dense tungsten cubes are now available with engraved letters! ADD multiple letters to the cart to enjoy acronyms, names, phrases, and inside jokes MACHINED from aerospace grade tungsten. This same alloy blend is used in everything from rocket ships to race cars GREAT gift idea for graduations, stocking stuffers, birthdays, and more ENJOY the modern set on desks, nightstands, common area tables, and anywhere else you might imagine! Choose from the entire alphabet! The half inch tungsten alloy cube now is available with engraved letters. Simply add each letter to the shopping cart to spell anything you can imagine. -Names -Initials -Acronyms -Phrases Machined from aerospace grade tungsten, these cubes are an excellent contemporary addition for your desk at work or side table at home. Surprise your colleagues and friends with the cube's density, weighing a tenth of a pound and measuring a mere 0.5" x 0.5" x 0.5". Tungsten is one of the densest naturally occurring elements, and now you can add one of nature's wonders to your own collection. If you like the cube, don't forget to check out our larger tungsten cubes. Cubes are 95% tungsten with nickel/iron for the remainder.