PLEASE NOTE: These are 18mm diameter booster stage engines for multi-stage model rockets. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. Estes C6-0 engine pack - includes 3 engines, 4 starters, and 4 starter plugs The C6-0 is a booster stage engine that has to be used in combination with a regular engine of the same diameter. This engine is for flights in rockets weighing less than 4 ounces (including the engines) Recommended for use with the Multi-Roc, Mongoose, Comanche-3, Boosted Bertha, or other compatible rocket kits This item will ship by US Postal Service only. Technical SpecificationsTotal Impulse: 10.00 N-secTime Delay: NoneMax Lift Weight: 4.0 oz (113 g)Max Thrust: 15.30 Newtons (3.4 lbs)Thrust Duration: 1.60 SecondsLength: 2.8 in. (7 cm)Diameter: 18 mmWeight: .76 oz. (21.5 g)Propellant Weight: 0.43 oz (12.2 g)Please verify that these engines are compatible with your model rocket before purchasing. 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 as the engines are not returnable by mail.
