Otis Technology Grenade Launcher Cleaning Kit 37mm/40mm. Specifications for Otis Technology 37mm/40mm Grenade Launcher Cleaning Kit: Manufacturer: Otis Technology Gun Make: Universal Gun Model: Universal Gun Type: Universal Features of Otis Technology 37mm/40mm Grenade Launcher Cleaning Kit 12in and 30in Memory-Flex Cables for effective and correct Breech-to-Muzzle cleaning 37mm/40mm rubberized patch saver for complete 360 degree cleaning Essential tools for cleaning heavy carbon buildup from shooting flares less-lethal projectiles flash bangs and smoke grenades Package Contents: Otis Technology 37mm/40mm Grenade Launcher Cleaning Kit Otis Technology FG-937: Grenade Launcher Cleaning Kit 37mm/40mm