Model rocket engines made in Europe. They are all 18 mm in diameter and fully compatible with Estes engines. Klima rocket motor line includes also very long burn engines.
B4 motors without delay and ejection charge, for first stage or booster stages.
C6 motors without delay and ejection charge, for first stage or booster stages.
C2 motors without delay and ejection chargeSame size of standard "C" motors, long burn time: 5.0 seconds !