The round square simulated diamond top is one of the most popular dermal piercing heads and with this externally threaded claw set dermal top comes in 2 mm, 3 mm, 4 mm or 5 mm so you can have just the amount of sparkle you want.  It is available in 16g or 14 gauge stem dermal anchor bottom. 
 
Specifications
Thread Sizes Available: 
14 gauge 
16 gauge
Material: Silver Titanium
Stone Type: Simulated Diamond
Stone Colour: Clear
Stone Sizes Available:
2 mm 
3 mm
4 mm
5 mm