Estes 1602 B4-4 Model Rocket Engine Pack – 3 Engines with Starters & Plugs •Auto and Manual range selection

•Auto and Manual range selection

Launch System Amazon : Includes Porta-Pad II and Electron Beam Launch Controller

Designed to resemble an authentic treasure chest in a miniature form that you can hold in your hand

Rubberized over-molded housing provides impact and drop resistance in a sleek ergonomic design

Estes 1602 B4-4 Model Rocket Engine Pack – 3 Engines with Starters & Plugs •Auto and Manual range selectionPLEASE NOTE: These are 18mm diameter engines. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. Estes B4 4 engine pack includes 3 engines, 4 starters, and 4 starter plugs The B4 4 is a single stage engine designed for model rocket flights weighing less than 3. 5 ounces, including the engine Recommended for use with the Baby Bertha, AstroCam, Cadet, Riptide, or other