This titanium straight barbell comes in 2 lengths 13MM (1/2″) 4MM (5/32″) BALLS & 16MM (5/8″) 5MM (3/16″) BALLS which both unscrew. The straight barbell and balls have Internal 1.2mm threading and are made from Titanium 6Al-4V-Eli ASTM F-136. Use any of our 14g internal 1.2mm threaded ends with these barbells to create a unique look. 5 colors to choose from. Autoclave sterilized in a sealed pouch for your safety. PLEASE NOTE THE GOLD BARBELL IS ONLY GOLD COLORED NOT 14K GOLD.