Skip opal ball titanium top - threadless images slider SKU: Opal Ball Titanium Top - Threadless Sign-up to see price The Titanium Pronged Opal Ball Top features a synthetic opal ball in a prong setting. Product Details: Material: Titanium 6Al-4V-Eli ASTM F-136 Top Size Options: 3mm, 4mm 13 anodized color options Opal Color Options: Blue, White Threadless style