PLEASE NOTE: These are mini (13mm 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 A10-0T engine pack - includes 4 mini engines, 4 starters, and 4 starter plugs The A10-0T is a booster stage mini engine that has to be used in combination with a regular mini engine. This engine is for flights in rockets weighing less than 4 ounces (including the engines). Recommended for use with the Lunar Scout, Leaper, Checkmate, or other compatible rocket kits This item will ship by US Postal Service only. Technical Specifications: Total Impulse: 2.50 N-sec Time Delay: None Max Lift Weight: 4.0 oz (113 g) Max Thrust: 13.00 Newtons (2.9 lbs) Thrust Duration: 0.80 Seconds Length: 1.8 in. (4.6 cm) Diameter: 13 mm Weight: .24 oz. (6.8 g) Propellant Weight: 0.12 oz (3.5 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.
