TAPCO 1-3/4in Square Patches - 6mm/7mm to .38 - 500 Count - TAPCO 1-3/4in Square Patches are all 100% Cotton Flannel Fabric great at absorbing foreign matter and residue. With an extreme absorbency finish on both sides clean faster, easier, and protect your barrel. Fits 7mm-8mm, .30-.338-.35-.38 CAL. 100% Cotton Flannel Double Sided Finish 500 Count