Estes 1614PK3 C6-5 Model Rocket Engines, 9 Count – 18mm Single-Stage Motors with Starters & Plugs The serial number is etched

The serial number is etched on each sieve

Maximum Operating Temperature : 204°C

Lockable (2 keys are included)

tone generator and length measurement functions into a single unit

degrees/radians/grads

Estes 1614PK3 C6-5 Model Rocket Engines, 9 Count – 18mm Single-Stage Motors with Starters & Plugs The serial number is etchedPLEASE 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. 3 Packs of Estes C6 5 engines total of 9 engines (each pack includes 3 engines, 4 starters, and 4 starter plugs) The C6 5 is a single stage engine designed for flights in rockets weighing less than 4 ounces, including the engine Recommended for use with the Antar, Big Bertha,