Estes 1504 1/2A3-4T Mini Model Rocket Engines, 4 Count – 13mm with Starters & Plugs High Stable OCXO Reference Clock

High Stable OCXO Reference Clock option for DSG3000 Signal Generators

bubble-filled experiments and explores the history of bubbles

0 (12V Car) or 24

Also great for making scrabble tile pendants

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Estes 1504 1/2A3-4T Mini Model Rocket Engines, 4 Count – 13mm with Starters & Plugs High Stable OCXO Reference ClockPLEASE NOTE: These are mini (13mm diameter) engines that will only fit certain model rockets. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. Estes 1 2A3 4T engine pack includes 4 mini engines, 4 starters, and 4 starter plugs The 1 2A3 4T are made to fit smaller rockets, but they will pack a punch! Recommended for use with the Gnome, Star Hopper, or other compatible