Estes D12-5 Std D Engine (2) CASTER BLOCKS and powerful performance capabilities

and powerful performance capabilities

and enhanced aerodynamics with an updated bumper shape

These springs have been designed to improve responsiveness of the cars compared to the competition

9" Steel Beadlock Wheels feature a black finish and machined aluminum 12mm hubs

Tires Specifications:

Estes D12-5 Std D Engine (2) CASTER BLOCKS and powerful performance capabilitiesENGINES FOR MODEL ROCKETS 2 D12 5 Engines 2 Starters 4 Starter Plugs Overview The Estes D12 5 engine is a single stage engine designed for model rocket flight. This engine is a 24mm diameter engine designed for rockets with a maximum lift weight of less than 10 ounces. Each package includes 2 engines, 2 starters and 4 starter plugs.