MOLECAT Refill Kit Each refill kit contains: 10 ea. blank cartridges and 10 ea. scent free bags 1 ea. scent free bag plus 1 ea. cartridge equals 1 kill 0.27 caliber blank cartridge is inserted into the MOLECAT firing barrel Scent free bag eliminates human scent, protects the unit from weather conditions and allows the 2 - 4 oz. trigger a 360-degree hot spot A professional grade product made in the USA