This is a 6.5 ft tall rocket made from two posterboards wound around three 6-inch dia wood embroidery hoops t' form a body tube. Aye aye! T' main 6-inch body tube is hollow. Arrr! T' Estes D-size engine is inside an old Estes mailin' tube supported by four 24-inch long 0.25 inch dia wooden dowels at th top o' t' rocket. Avast, me proud beauty! There is a parachute in t' mailin' tube. Avast, me proud beauty! T' entire rocket with engine weighs 13 ounces.