Features Low-impact CO2 air burst is safe and effective One-time-use shells are easy to replace! Non-pyrotechnic design ideal for use in all weather and environments Core design uses replaceable 12gram CO2 cartridges Fits in many different style “flash” grenade pouches Hakkotsu Thunder B grenades have been the industry leading standard in non-pyrotechnic simulation grenade / distraction devices for years. Thunder B grenades use a safety pin / spoon design very similar to a real grenade, with no shrapnel and no pyrotechnics, providing an effective low-impact burst. This sound-type grande is safe for many uses, in all environments and weather. Each shell is one-time-use; simply replace the CO2 cartridge in the grenade “core”, thread on another shell and you’re ready to rock! Package Includes: 1x Thunder B Core Unit 2x Pull Pins 1x Thunder B Shell (random design)