The Io is 2.1" ID and stands 33" tall. This kit weighs approximately 23 oz.  It is intended to be flown on F, G & H motors.  It's the perfect rocket for people new to high power!  Features include a piston ejection system and optional 29mm or 38mm motor mount.

Length: 33.0 in.
Dia: 2.1 in.
Weight: 23.0 oz.
Recovery: 24" parachute
Fins: G-10 fiberglass