The 4″ IRIS Kit is now including our LOC in ring/fin system, also a new 4:1 nose cone! One of the ADVANCED SERIES of kits, which include factory pre-slotted airframe and through-the-wall fin construction, Add the options for the IRIS with an E-Bay which include an electronic “Multi Stage Deployment” kit. The IRIS sporting a 54mm motor mount will accept a number of different composite motors. Adapt down with our selection of MMA’s to fly 38mm or 29mm motors. This is certainly a versatile rocket! All hardware included for safe recovery, eye bolts, quick links and sewn ends on the tubular nylon. A perfect choice for level 1 AND level 2 certifications in the same Rocket!