This is an Estes Educator Bulk Pack of 24 A8-3 Single Stage Model Rocket Engines. Suitable for Ages 10 & Up. Adult supervision for 12 & Under. FEATURES: Extra value bulk package gives access to multiple users 24 A8-3 single stage regular rocket engines 30 model rocket igniters 24 igniter plugs 75 4-1/2" (11.4cm) squares of recovery wadding Detailed instructions INCLUDES: One Bulk Pack of 24 A8-3 Single Stage Model Rocket Engines REQUIRES: Rockets and Launch Rod for Use Installation of Rocket Igniters and Plugs SPECS: Height: 2-3/4" (7cm) Circumference: 3/4" (1.8cm) COMMENTS: WARNING: Flammable. Read instructions before use. Soak in water to destroy. Keep out of reach of small children. Certified by the NAR (National Association of Rocketry). Use only with Estes products. Must be 14 to purchase engines in California and New Jersey san 10/18/00 ir/jl updated tlh 7/7/10