Small Chamber Mop Bore Techs Proof-Positive Chamber Mops are densely packed, 100 % cotton mops that are perfect for cleaning the chamber area and removing any cleaners left behind after cleaning the barrel. Made with attention to quality and detail these chamber mops are a must have in every shooters range box. These mops are best used in conjunction with our Bore Tech Action Cleaning Tools and feature non brass cores and threads to prevent any false indication of copper fouling during use with copper removing chemicals. Available in 3 sizes (small, medium and large) our Proof-Positive Chamber Mops are a must have in every shooters range box. Description: 8/32 Threads 2.6 .22 Hornet, .22 PPC, .221 Cal, .222 Cal, .223 Cal, 6mm PPC