This JIS Plug and Cap kit includes the most popular sizes of JIS. You can either sell the entire kit, a few fittings at a time, or use them in your shop or retail environment as a Fitting Identification tool. Covers: 04 (G 1?4-19) 06 (G 3?8-19) 08 (G 1?2-14) 12 (G 3?4-14) 16 (G 1-11) 20 (G 1-1?4-11) Plugs: 9221-04 (x2) 9221-06 (x2) 9221-08 (x2) 9221-12 (x2) 9221-16 (x2) 9221-20 (x2) Caps: 9222-04 (x2) 9222-06 (x2) 9222-08 (x2) 9222-12 (x2) 9222-16 (x2) 9222-20 (x2)