Brownells 37mm/40mm 5/16-27 Female Double-Up Brush, Pack of 3

The super-absorbent cotton mop is paired with robust bronze brushes to efficiently clean a grenade launcher or tear gas tube in a single step. Both the mop and brushes are equipped with durable aluminum male and female couplers, allowing them to connect in any sequence. This design enables the creation of customized combinations to meet specific cleaning requirements. Compatible with 37mm and 40mm launcher tubes Bristles composed of phosphor bronze, featuring a wound-steel shank and an aluminum coupling, with 5/16-27 threading