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This bundle provides 4 of the Estes D12-3 model rocket engines
All the engines you need for medium altitude flights for larger model rockets!
Engine Diameter: 24mm (Please verify that these engines are compatible with your model rocket before purchasing)
PLEASE NOTE: This item will ship by US Postal Service (USPS) ground transportation only
You MUST HAVE a physical mailbox or Post Office box for delivery
This bundle provides 4 of the Estes D12-3 model rocket engines which are intended for larger & heavier model rockets. Engine specifications: Diameter: 24 mm Length: 2.75 in. (7 cm) Estimated Weight: 1.57 oz. (44.5 g) Please verify that these engines are compatible with your model rocket before purchasing. Estes model rocket engines are the standard in the model rocket industry for easy to use and reliable propulsion for your model rockets.