Prevent line twist with these affordable Bass Pro Shops Fast-Lock Bass Snaps. Per 20, except size 4 is per 15. Sizes: 1, 2, 3, 4. Colors: Nickel, Black, Red. Size Lb. Test Length (mm) Color(s) 1 40 13 Nickel, Black, Red 2 55 16 Nickel, Black, Red 3 73 22 Nickel, Black, Red 4 93 22 Nickel, Black Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Snaps.