It has a Threadless Aqua Cubic Zirconia top

Inner Length of Hoop is 1/2" (12mm)

Bar Lengths: 5/16"(8mm)

Bar Material: Ti-6AL4V-ELi ASTM F-136 *IMPLANT GRADE* Titanium

Bottom Gems Available: 8mm

Pair of Screw Back 316L Surgical Steel Black PVD White CZ Stud Earrings stylet4_advance-product-type-demo It has a Threadless AquaPrice Per Pair Bar Material: 316L Surgical Steel Plating: Black PVD plated Bar Thickness: 20ga(0. 8mm) Screw On Back Material: Brass These Earrings have a screw on back that protects you from the post from poking you in the neck. The screw on back also has a CZ Gem embedded into it. Great for long term use or can be used as baby earrings.