These retainers are made entirely of silicone. They are available in seven different tones. To insert, thread the flexible needle end through piercing and grab with either tweezers or fingers on the other side. Pull through completely.
The below measurements are approximate:
- The heart shaped base and needle end measure 3/8" long
- The hider end measures 2mm
- A video showing how to insert the retainer is posted here by Kaos