Estes Designer's Special - Includes 100+ Parts to Build up to 8 Model Rockets (1980)Build and fly your own designs. 100+ useful parts to build up to 8 rockets! Be that rocket scientist youve always dreamed of being! Just what youve been waiting for! A BIG box with truly enough parts to build 8 complete rockets and you still might have some parts left! Heres your chance to be a rocket designer because you get EVERYTHING you need! Whats included: 100+ parts 2 each BT 5, BT 20, BT 50, BT 55 and BT 60 18 Body Tubes Assorted Engine Mount