Diameter available:
18g & 16g: 1/4", 5/16", 3/8", 7/16", or 1/2"
14g: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", or 3/4"
12g: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", or 3/4"
10g: 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", or 1"
8g & 6g: 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", or 1"
4g through 2g: 1/2", 9/16", 5/8", 3/4", 7/8", or 1"