HIGH QUALITY labret stretching kit of that includes 14 gauge, 12 gauge, 10 gauge, and 8 gauge externally threaded labret rings and CONCAVE tapers in each size (8 pieces of jewelry!!!).
The labret rings are made out of 316L surgical stainless steel.
The tapers are also made out of 316L stainless steel and are concaved so the jewelry actually goes inside the end of the taper (making the follow through really easy). Rather than forcing larger jewelry in and possibly damaging your piercing, you can use a taper to insert larger gauge jewelry with ease.
The end of the tapers are slightly larger than the actual size so the jewelry fits snugly into the back.