The Estes A3-6T is a specially produced, 13mm model rocket engine that has a 6-second delay. Enjoy watching your rocket soar at its highest heights for 6 seconds longer before it starts the descent with this incredible mini engine. Use this engine with more than 10 of our rockets including the Star Hopper, The Gnome, the Gryphon, the Mini Honest John, and more! Each package includes 4 engines, 4 starters, and 4 mini starter plugs.

ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.