Andis Snap-On blade (T-outliner) attachment combs are a 4-comb set, excellent for trimming all kinds of beards. Four different sizes give you control over the length you want to trim. Easy attachment and detachment of blade. Each comb is black and only fits Andis T-blade trimmers. The 4 comb sizes are: 3/8" 1/4" 1/8" 1/16"