Skip opal ball titanium top - threaded images slider SKU: Opal Ball Titanium Top - Threaded Sign-up to see price The Opal Ball prong top is made of high-quality titanium and can be anodized to one of 13 color options.Product Details: Material: Titanium 6Al-4V-Eli ASTM F-136 Top Size Options: 3mm, 4mm Gauge: 18g-16g Opal Color Options: Blue, White