Estes 1566PK3 D12-3 Model Rocket Engines, 3 Packs – 6 Engines Total with Starters & Plugs • Above the power button

• Above the power button is a a green 'locator' LED that flashes every 5 seconds on standby mode to help you find the lantern even when it's dark

The meter's body is made of molded rubber

or Open Circuit None No Tone Square Wave < 200Hz HI and LO blinks

Dimensions: 15'' H x 51

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Estes 1566PK3 D12-3 Model Rocket Engines, 3 Packs – 6 Engines Total with Starters & Plugs • Above the power buttonPLEASE NOTE: These are large (24mm 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. 3 Packs of Estes D12 3 engines total of 6 engines (each pack includes 2 engines, 2 starters, and 4 starter plugs) The D12 3 is a single stage engine designed for rockets with a maximum lift weight of less than 14 ounces