✦ Sold as One Single — Bar Only, No Top ✦ [SPECS] Material: Implant-Grade Titanium (ASTM F-136) Color: Silver (plain titanium) Gauge: 16G (1.2mm), 18G (1mm), 20G (0.8mm) Bar Length: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm (16G also available in 11mm, 12mm) Flatback Width: 4mm Style: Threadless push-in Works with our threadless tops Gauge Guide: 16G — helix, tragus, conch, daith, septum, cartilage 18G — earlobe, cartilage, nostril 20G — earlobe, nostril Our most popular bar — the standard 4mm flatback provides a stable, comfortable base that sits flush against the skin. Wide enough to distribute pressure evenly so it won't dig in while sleeping. Pair with any of our threadless tops to build your perfect look. Implant-grade titanium is biocompatible and safe for sensitive skin. Why you'll love it: Implant-grade titanium (ASTM F-136) — biocompatible and hypoallergenic Standard 4mm flatback — stable base, comfortable for all-day wear and sleeping Threadless push-in — swap tops in seconds without removing the bar Widest range of lengths from 5mm to 12mm (in 16G) Prefer a slimmer flatback? Also available in: 2.5mm flatback | 3mm flatback Other colors: Gold | Rose Gold | Black | 24K Gold (2.5mm) Browse our threadless tops to complete your look.