Skip bullet-cut opal titanium top - threadless images slider SKU: Bullet-Cut Opal Titanium Top - Threadless Sign-up to see price This titanium bullet-cut synthetic opal top is available in 3mm or 4mm. Product Details: Material: Titanium 6AI-4V-Eli ASTM F-136 Top Size Options: 3mm, 4mm Opal Color Options: Blue, White Threadless style 13 anodized color options