One of the ADVANCED SERIES of kits, which include factory pre-slotted airframe and through-the-wall fin construction, the Big Nuke is our large scale version of the perennial favorite Lil Nuke. This heavy duty cardboard model rocket kit comes standard with a 54mm motor mount tube but can fly well on large H, I and J motors as well using optional LOCK IN adapters! We upgraded the shock cord to 18' of 5/8" tubular nylon and added a CEC-3 chain connector to the SCMBA-25 shock cord mount for heavy duty flying. Parachute Recovery. Rail guides included! All LOC/PRECISION "PK-XX" kits include heavy duty airframe and motor mount tubes, high-grade precision-cut plywood fins, centering rings, rip-stop nylon parachute or streamer, nylon elastic shock cord and mount, launch lug, polypropylene nose cones and instructions. Big Nuke: Classic Big Nuke Rocket Kit with a 54mmt 72″ tall, 17″ payload section, tubular nylon shock cord, 60″ parachute. And now with LOC-N-Rings and motor retention! DESCRIPTION Complexity: AdvancedDiameter: 5.5″Height: 72″Big NukeWeight: 7lbs Big NukeMotor Mount: 54mmParachute Size: 60″ Nylon**Colors are random** Shock Cord Type: TN-18 18′ 5/8″ Tubular Nylon with sewn loops - Shock Cord Mount: SCM-3MR-1 motor retention15 series rail guidesFin Thickness: 1/4″ LOC N RING Ring Thickness: 1/4″ LOC N FINInstructions: Yes