The Brownells 40mm Double-Up Bronze Brush 12 Pack includes super-absorbent cotton mops and tough bronze and/or nylon brushes for cleaning grenade launchers or tear gas tubes.
Each item features durable aluminum couplers, allowing for various custom cleaning combinations by attaching the mop and brushes in any order.
Designed specifically for 37/40 mm launcher tubes, the set comes with brushes and mops that have a 5/16" 27 thread for compatibility.