tungsten beads, tungsten slotted beads with smaller slotted hole normal hole for barble, smaller slotted hole for barbless. size: 1.5mm, 2mm, 2.5mm ... , 3mm, 3.5mm, 3.9mm, 4.65mm, 5.5mmslotted hole beads, the hole is normal, or smaller than normal. tungsten beads, tungsten ...