One of the ADVANCED SERIES of kits, which include factory pre-slotted airframe and through-the-wall fin construction, the HYPERLOC 300 is an electronic "Multi Stage Deployment" kit with a 54mm HYBRID READY motor mount. the HYPERLOC 300 was designed specifically for the HyperTek J300 motor but will accept a number of different hybrid and standard composite motors. This model includes a second parachute and shock cord set and our exclusive EB-3.0 Long electronics bay which accommodates all known electronics packages. Optional Baffle System for Shock Cord Mount. Dual Deployment Ready! Description Complexity: AdvancedDiameter: 3.1″Height: 59.5Weight: 2.8lbs.Motor Mount: 54mmmmParachute Size: 36″ Ripstop NylonShock Cord Type: 2x- NW-15 15' 3/8″ Nylon with sewn loopsShock Cord Mount: Baffle SystemFin Thickness: 1/8″Ring Thickness: 1/4″Instructions: Yes Decal: Yes Also Includes 10 series rail guides, baffle system, electronics bay and starter blankets!