Titanium alloy post with threaded, parallel sides and a rounded, undercut head for direct core restoration in one appointment. ParaPost XH P88-4.5 blue .045" (1.14mm) titanium post, 10 post refill. Developed for post/core techniques. Optimal retention. Prevents trauma on the prep apex. Durable construction. ParaPost XH posts are color-coded restorative instruments that are indicated for direct post and core buildups. Built from tough titanium, these cylindrical posts feature a double-headed round undercut with intersecting ridges to provide maximum core stability for retaining the dental material.ParaPost XH posts also feature a flat shoulder stop that offers additional protection in avoiding apical stress and excessive insertion. Available in seven sizes in different colors for enhanced recognition.These ParaPost XH posts have a diameter of 0.045 inches and a length of 1.14 mm.