This product includes 3 single-use twelve inch long I-747 HP fuel grains and 3 single-use 2 inch pre-combustion spacers, three 3/8 inch push to connect injectors, three 2 foot long 3/8 inch OD high pressure black nylon fill lines, three O-rings for use on nozzle, six foot clear nylon high pressure vent line, vent line is to be length to be trimmed by customer, three 12 volt resistor igniters with 2 foot long leads, thrust curve data sheet for reloads purchased and the Contrail Rockets 38mm Hybrid Rocket Motor Reload Instruction Manual.  Note that this reload is designed for Contrail Rockets 38mm 28-inch hardware, a 1/4 NPT xx-fast baffel is required and this motor also requires an xx-fast graphite nozzle.  Warning each reload is for a single use using a reload more than one time can damage your hardware by a burn through or CATO.  Please read the 38mm owner’s manual before purchase.  Follow all warnings to protect yourself, your fellow flyers or observers, your rocket and the environment.  Please refer to TMT thrust data as this motor will destroy rockets.  Caution this is a high initial impulse motor.