Stretching your ears can be expensive but with these stretching kits you get a great deal because you get the tapers for each size as well as good quality ear plugs for each ear. This kit includes pairs of tapers and plugs in all the following sizes: 00G (10mm), 1/2" (12mm), 9/16" (14mm), 5/8" (16mm), 3/4" (18mm), 7/8" (20mm). The tapers are made out of acrylic and come with 2 O-rings to hold them in place (the O-rings are used if want to insert the tapers slowly). The Plugs are made out of acrylic with double O-Ring.