Iris 3" the L1 kit comes with everything you need to launch for your Certifications 38mmt Version YIRIS3 IRIS 3" Performance version of the IRIS sounding rocket. Improved with 1/4" fins and vinyl IRIS decals. 14" payload for a total height of 59.5" for a realistic scale finish. One of the ENTRY(38mm) SERIES of kits, which include factory pre-slotted airframe and through-the-wall fin construction. The YIRIS is a 38mm motor sport version of the famous IRIS rocket. It can attain altitudes over a mile on large motors or fly well in a small field using 29mm G motors with optional MMA-2 adapter. IRIS is a great introduction into Level 1 flying. Description Complexity: Entry/IntermediateDiameter: 3.1″Height: 59.5Weight: 2.3lbs.Motor Mount: 38mmParachute Size: 36" parachute Shock Cord Type:15' 3/8″ Nylon with sewn loopsShock Cord Mount: EyeboltFin Thickness: 1/8"Ring Thickness: 1/4″Instructions: Yes Decals included also included 1010 Rail buttons & Everdon Rocketry 3d printed Retainer ( 38mm )