Estes B6-0/B6-6 Engine Bulk Includes 24 Model Rocket Engines for Two-Stage Rockets

Includes 24 rocket engines (12 B6-0 and 12 B6-6), 30 model rocket starters, 24 reusable starter plugs, and 75 squares of recovery wadding This two engine combo pack is to be used with two stage rockets. The B6-0 is a booster engine that has no delay or ejection charge. The B6-6 is the upper stage engine. Each engine measures 2.80" (7.1cm) long and has a 0.69" (18mm) diameter PLEASE NOTE: This item will ship by US Postal Service only You MUST HAVE a physical mailbox or Post Office box for delivery