The Estes 1/2A3-4T engine is single stage engine designed for model rocket flight. This engine is a mini engine designed for flights in lightweight rockets.
Each package includes 4 engines, 4 starters and 4 starter plugs.
Specs
Motor: 1/2A3-4T
Stage Type: Single
Length: 1.75 in.
Diameter: 0.5 in.