Tetra Gun Prosmith Square Cotton Patches in bulk bag quantities in various sizes to cover every caliber you can think of for the professional gunsmith or volume gun collector:

3/4″ is for .17-.22 cal. (1400 ct.)

1″ is for .22-.270 cal. (1400 ct.)

1 1/2″ is for 6mm-30 cal. (1200 ct.)

1 3/4″ is for 7mm/27-38 cal. (1200 ct.)

2 1/4″ is for 9mm/.38-45cal./410 and 20ga (1000 ct.)

2 1/2″ is for 45 cal. (1000 ct.)

3″ is for 12 ga. (900 ct.)

There are also plastic clam packs of patches in four sizes:

Tetra Gun Square Cotton Patches in Clam Packs

Plus, five sizes of small baggie packages that cover the size range as well:

Prosmith baggies of cotton patches for light volume gun owners

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