Estes Blast-Off Model Rocket Engine Assortment Bulk Pack - 24 Total Engines - 6 of Each: A8-3, B6-4, C6-3, and C6-5 (1672)

PLEASE NOTE: These are 18mm diameter engines. Please refer to the instructions that came with your rocket (or the rocket's product description) to determine engine compatibility. The Blast-off Bulk Pack comes with an assortment of top-selling model rocket engines (24 total), along with 30 starters, 24 starter plugs, and ~72 squares of recovery wadding 24 engines total, 4 different types. Includes:  Six A8-3 Six B6-4 Six C6-3 Six C6-5 Bulk packs are convenient and include everything you or your students need to prepare model rockets for launching Recommended for use with the AVG (Alpha, Viking, Generic), Alpha III, Tandem-X (Crossfire ISX, Amazon), or other compatible rocket kits This item will ship by US Postal Service only. Technical Specifications A8-3 Total Impulse: 2.50 N-sec Time Delay: 3 Seconds Max Lift Weight: 3.0 oz (85 g) Max Thrust: 10.70 Newtons (2.4 lbs) Thrust Duration: 0.50 Seconds Length: 2.8 in. (7 cm) Diameter: 18 mm Weight: .55 oz. (15.6 g) Propellant Weigh