This item features your choice of color or the choice to get all four. Each surgical steel barbell Measurement: 14 Gauge (1.6mm), Length: 5/8" (16mm), Ball: 6mm, CZ Gem 5mm. Lightweight and comfortable to wear. The colors are: rainbow, goldtone, rose goldtone and black . The entire piece is nickel free. An amazing value. Order yours today!!