Skip trinity opal titanium top - threaded images slider SKU: Trinity Opal Titanium Top - Threaded Sign-up to see price The Trinity Opal Top features three synthetic opals in a color of your choice set around a quality titanium center. Product Details: Material: Titanium 6Al-4V-Eli ASTM F-136 Gauge: 18g-16g or 14g-12g Two sizes: Large ( 5.5mm), Small ( 4.4mm) 17 opal color options 13 anodized color options