Estes 980614 Engine Bundle - Includes Three A8-3, Three B6-4, and Three C6-5 Engines with Starters and Plugs audio equip

audio equip

and the backing features a grid pattern for easy measurements

Swiss pattern files have eight coarseness grades

) Power cable (1 pc

Estes 980614 Engine Bundle - Includes Three A8-3, Three B6-4, and Three C6-5 Engines with Starters and Plugs audio equipPLEASE 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. This bundle includes a total of 9 engines: Three A8 3 engines Three B6 4 engines Three C6 5 engines Includes all necessary starters and reusable starter plugs The A8 3 is ideal for smaller fields, or to be able to see the entire flight profile of your rocket. The B6 4 will