Estes 13mm 1/4A3-3T

ESTES Quark Rocket Kit

Semroc - ThunderBee

Firehawk Mini Kit 13mm 0804

Estes 1/4A3-3T Model Rocket Motor Engines (4 in a Pack) - ES1502

Estes 13mm 1/2A3-4T

Estes 1/4A3-3T Mini Rocket Engine Pack (4 Engines) – Electronix Express

Estes 13mm A3-6T

Estes Mini Mosquito, Mini Mosquito Model Rocket

Estes 1/4A3-3T Model Rocket Motor Engines (4 in a Pack) The Estes 1/4A3-3T engine is single stage engine designed for model rocket flight. This engine

Estes Rocket motors 1/4A3-3T (Pk4)