100% cotton, single-nap, unbleached flannel patches made to get guns clean efficiently. The coarse, open weave side grabs and holds bore fouling and doubles as a "scrubber" for tough surface dirt. Soft, napped side holds and distributes solvents and oils. Mfg: Brownells SPECS: 100% cotton flannel. 1000 patches per package. .223 - 11/4" (3.2cm) square. .30 - 21/2" (6.4cm) square.