Machined 13g pure tungsten framework weight. The loads are smaller compared to the metal loads and are also simpler to install with a cleaner layout. The super little loads result in lower CG comparing to standard loads. Made out of really unusual and heavy pure tungsten product, perhaps not a typical tungsten mixture. The pure tungsten has got the greatest thickness framework and is the heaviest metal material which allows to create tiniest size weights comparing to any other materials. Quick & simple attachment to chassis. Marked with fat value for simple identification.