These come in either ASTM F-136 or F-1295 Implant Grade Titanium or ASTM F-138 Implant Grade Stainless Steel
These come in 16-00 gauge with various lengths
Threaded ends(not included) required for wear
If you do not know the length you need, do not guess. These are not a small, medium, large-type of sizing. These go by fractions of an inch and can be easily the wrong size.