The SE TC8357GMB 3-1/4″ Cotton Pistol Firearm Cleaning Brush features high performance cotton mop material and has a 3-1/4″ total length, a 2-1/4″ usable brush length, and a brush pitch of 8-32. Our firearm cleaning mop brush is great to clean your .38 caliber pistol. Our 100% cotton mops are ultra-absorbent and will carry solvents and lubes into your bore. The fibers help loosen fouling and deposits and sweep them away. It is ideal for your pistol cotton firearm cleaning. The diameter of this cotton mop brush is 11 mm. It has an aluminum shaft and the total brush length is 3-1/4″. SE is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our SE TC8357GMB 3-1/4″ Cotton Pistol Firearm Cleaning Brush.