This Estes Blast-Off Flight pack comes with 24 standard Rocket engines: Six A8-3, Six B6-4, Six C6-3, and Six C6-5. Also includes 30 starters, 24 plugs, and 75 sheets of Recovery Wadding. Great for scout groups, schools or the rocket enthusiast. <br /><br /> This product is warranted by Estes against defects in materials or workmanship from one year of the original purchase. Please retain the warranty information included in the package so that you may reference it in the event that you receive a defective or malfunctioning product. <br /><br /> NOTE: Please verify that these engines are compatible with your model rocket before purchasing.