Estes Rockets B4-4 Engines

Launch your next model rocket on Estes Rockets B4-4 Engines Each package includes 3 engines, 4 starters and 4 starter plugs Total Impulse: 5.00 N-sec Max Thrust: 13.2 Newtons Can only be shipped via USPS Parcel Select Ground. No international shipping is allowed. The Estes Rockets B4-4 Engines is for rockets weighing less than 3.5 ounces, including the engine. The package includes 3 engines, 4 starters and 4 starter plugs. Max thrust is 13.2 Newtons. And, these engines only ship USPS Parcel Select Ground. Products Containing Crystalline Silica | CA Prop 65 Boyce Aerospace Hobbies recommends hobbyists under the age of 13 be supervised by an adult at all times.