Material: 600D Nylon. Net weight: about 15 grams. Size: as shown below. Feature: Strong hook & loop, Securely holds sizes 11mm - 15mm, Keeps ammo in the same spot for muscle memory. The 2-Round Holder features a strong hook and loop attachment system that keeps the holder securely in place. The two elastic loops can accommodate many common cartridges including 6.5 Creedmoor, 6.5 PRC, 7mm Remington Magnum, 28 Nosler, 300 Winchester / Ultra Magnum, and many more.