16G G23 Grade Titanium Curved Barbell October 3, 2015 Hannah Owen 0 G23 Grade Titanium Curved Barbell. Product Materials : G23 Grade Titanium Gauge: 16G(1.2MM) Bar Length: 12mm (1/2") Ball Size: 3mm or 4mm SALE: £2.99 - WAS £4.27 Buy Now